One morning in Philadelphia, the sun shone bright through all the thick jungles and the tall churches. John, 6, wearing the worn-out clothes, walked from a far place, his dark small hands holding a piece of stolen bread.
John stopped for a moment at the entrance to the church and then left tightly holding the bread,
He was an orphan(孤儿), whose parents were killed in World War II leaving him alone in the orphanage for five years, Like many children in the house, he had a lot of free time. Mostly no one took care of them, so they had to learn how to steal those they wanted.
John believed God to be real, so every Sunday morning in any case he would go to the church to have a look and listen to those people singing inside or reading the Bible. He felt only at this moment he was the child of God and so close to God. But he couldn’t enter because his clothes were so dirty. John himself knew it.
John was quietly calculating the times. This was his 45th Sunday at the entrance to the church. He stood on tiptoe（踮着脚尖） for a while and walked away.
As time passed, the pastor(牧师) noticed John and learned from others that he was the small boy who liked stealing things in the orphanages.
On the 46th Sunday, the sun was shining and John came still holding a piece of bread with his dark small hands. When he just stood there, the pastor came out. He felt like running away, but he was carried by the pastor's friendly smile.
The pastor walked up to his side, clearly seeing John's small hands shaking.
"Are you John?"
John didn't answer, but looked at the pastor and nodded.
"Do you believe in God?" the pastor patted John on his head with dust.
"Yes, I do!" This time John told him loudly.
"So you believe in yourself?"
John looked at the pastor, without a word.
The pastor went on saying, "At the first sight of you, I find you're different from other kids because you have a good heart."
His face turning red, John said nervously, "In fact, I'm a thief." With that, he lowered his head.
The pastor didn't speak, but held John's dark small hands, slowly opened them and put them against his wrinkled face.
"Ah" Just at the same time, John shouted and was about to take out his dark small hands. Yet the pastor tightly held his small hands and spread them out in the sun.
"Do you see, John?"
"What?"
"You're cupping the sunshine in your hands."
John blankly looked at his hands: when did they become so beautiful?
"In God's eyes, all children are the same. When they are willing to spread out their hands to greet the sun, the sun will naturally shine on them. And you have two things more than they do. First is courage and the second is kindness." With that, the pastor led him into the church. It was the first time that John went into this sacred place, and at this moment he didn't feel inferior, but the unspeakable warmth.
On that morning greeting the sunshine, John found himself again, along with the confidence, satisfaction, happiness, dreams he had never had.
Twenty years have passed. Now the boy who ever tightly held the bread with his dirt hands has been the most famous cook in Philadelphia and made many popular dishes.
Every Sunday morning, he would personally send the bread he baked to the orphanage. Those children who greeted him with cheers were used to consciously spreading their palms before they got the bread.
Because they all knew when we are willing to spread out our hands to greet the sunshine, the sun will naturally shine on us.
1.The method the writer uses to develop Paragraph is ______________
A．presenting contrasts (对比) B．showing causes （原因）
C．offering analyses D．providing explanations
2.Why didn't John go inside whenever he went to the church?
A．He was frightened to be recognized by the pastor
B．He was not welcomed by those singing in the church.
C．He was sorry for his dirty clothes and identity as a thief.
D．He was left alone in the orphanage and nobody cared for him.
3.Which of the following questions did John reply certainly?
A．“Are you John?" B．"Do you see, John?"
C．"So you believe in yourself?" D．"Do you believe in God?"
4.Which of the following can best describe the pastor's great effect on John?
A．John became a famous cook.
B．John admitted his bad behavior. (行为)
C．John believed God to be real
D．John spread warmth to other orphans.
5.According to the passage, the sunshine cupped in hands can bring ________
A．cheers and confidence B．dreams and imagination
C．courage and kindness D．forgiveness and satisfaction
高二英语阅读理解简单题
One morning in Philadelphia, the sun shone bright through all the thick jungles and the tall churches. John, 6, wearing the worn-out clothes, walked from a far place, his dark small hands holding a piece of stolen bread.
John stopped for a moment at the entrance to the church and then left tightly holding the bread,
He was an orphan(孤儿), whose parents were killed in World War II leaving him alone in the orphanage for five years, Like many children in the house, he had a lot of free time. Mostly no one took care of them, so they had to learn how to steal those they wanted.
John believed God to be real, so every Sunday morning in any case he would go to the church to have a look and listen to those people singing inside or reading the Bible. He felt only at this moment he was the child of God and so close to God. But he couldn’t enter because his clothes were so dirty. John himself knew it.
John was quietly calculating the times. This was his 45th Sunday at the entrance to the church. He stood on tiptoe（踮着脚尖） for a while and walked away.
As time passed, the pastor(牧师) noticed John and learned from others that he was the small boy who liked stealing things in the orphanages.
On the 46th Sunday, the sun was shining and John came still holding a piece of bread with his dark small hands. When he just stood there, the pastor came out. He felt like running away, but he was carried by the pastor's friendly smile.
The pastor walked up to his side, clearly seeing John's small hands shaking.
"Are you John?"
John didn't answer, but looked at the pastor and nodded.
"Do you believe in God?" the pastor patted John on his head with dust.
"Yes, I do!" This time John told him loudly.
"So you believe in yourself?"
John looked at the pastor, without a word.
The pastor went on saying, "At the first sight of you, I find you're different from other kids because you have a good heart."
His face turning red, John said nervously, "In fact, I'm a thief." With that, he lowered his head.
The pastor didn't speak, but held John's dark small hands, slowly opened them and put them against his wrinkled face.
"Ah" Just at the same time, John shouted and was about to take out his dark small hands. Yet the pastor tightly held his small hands and spread them out in the sun.
"Do you see, John?"
"What?"
"You're cupping the sunshine in your hands."
John blankly looked at his hands: when did they become so beautiful?
"In God's eyes, all children are the same. When they are willing to spread out their hands to greet the sun, the sun will naturally shine on them. And you have two things more than they do. First is courage and the second is kindness." With that, the pastor led him into the church. It was the first time that John went into this sacred place, and at this moment he didn't feel inferior, but the unspeakable warmth.
On that morning greeting the sunshine, John found himself again, along with the confidence, satisfaction, happiness, dreams he had never had.
Twenty years have passed. Now the boy who ever tightly held the bread with his dirt hands has been the most famous cook in Philadelphia and made many popular dishes.
Every Sunday morning, he would personally send the bread he baked to the orphanage. Those children who greeted him with cheers were used to consciously spreading their palms before they got the bread.
Because they all knew when we are willing to spread out our hands to greet the sunshine, the sun will naturally shine on us.
1.The method the writer uses to develop Paragraph is ______________
A．presenting contrasts (对比) B．showing causes （原因）
C．offering analyses D．providing explanations
2.Why didn't John go inside whenever he went to the church?
A．He was frightened to be recognized by the pastor
B．He was not welcomed by those singing in the church.
C．He was sorry for his dirty clothes and identity as a thief.
D．He was left alone in the orphanage and nobody cared for him.
3.Which of the following questions did John reply certainly?
A．“Are you John?" B．"Do you see, John?"
C．"So you believe in yourself?" D．"Do you believe in God?"
4.Which of the following can best describe the pastor's great effect on John?
A．John became a famous cook.
B．John admitted his bad behavior. (行为)
C．John believed God to be real
D．John spread warmth to other orphans.
5.According to the passage, the sunshine cupped in hands can bring ________
A．cheers and confidence B．dreams and imagination
C．courage and kindness D．forgiveness and satisfaction
高二英语阅读理解简单题查看答案及解析
The sun shone in through the dining room window, lighting up the hardwood floor. We had been talking there for nearly two hours. The phone of the “Nightline” rang yet again and Morrie asked his helper, Connie, to get it. She had been taking down the callers’ names in Morrie’s small black appointment book. It was clear I was not the only one interested in visiting my old professor—the “Nightline” appearance had made him something of a big figure—but I was impressed with, perhaps even a bit envious of, all the friends that Morrie seemed to have.
“You know, Mitch, now that I'm dying, I’ve become much more interesting to people. I’m on the last great journey here—and people want me to tell them what to pack.”
The phone rang again. “Morrie, can you talk?” Connie asked.
“I’m visiting with my old friend now,” he announced, “Let them call back.”
I cannot tell you why he received me so warmly. I was hardly the promising student who had left him sixteen years earlier. Had it not been for “Nightline”, Morrie might have died without ever seeing me again.
What happened to me? The eighties happened. The nineties happened. Death and sickness and getting fat and going bald happened. I traded lots of dreams for a bigger paycheck, and I never even realized I was doing it. Yet here was Morrie talking with the wonder of our college years, as if I’d simply been on a long vacation.
“Have you found someone to share your heart with?” he asked. “Are you at peace with yourself?” “Are you trying to be as human as you can be?”
I felt ashamed, wanting to show I had been trying hard to work out such questions. What happened to me? I once promised myself I would never work for money, that I would join the Peace Corps, and that 1 would live in beautiful, inspirational places.
Instead, I had been in Detroit for ten years, at the same workplace, using the same bank, visiting the same barber. I was thirty-seven, more mature than in college, tied to computers and modems and cell phones. I was no longer young, nor did I walk around in gray sweatshirts with unlit cigarettes in my mouth. I did not have long discussions over egg salad sandwiches about the meaning of life.
My days were full, yet I remained, much of the time, unsatisfied. What happened to me?
1. When did the author graduate from Morrie’s college?
A. In the eighties. B. In the nineties. C. When he was 16. D. When he was 21.
2. What do we know about the “Nightline”?
A. Morrie started it by himself. B. It helped Morrie earn a fame.
C. The author helped Morrie start it. D. It was only operated at night.
3. What can we infer from the passage?
A. Both the author and Morrie liked travelling.
B. Morrie liked helping people pack things for their journeys.
C. The author envied Morrie’s friends the help they got from him.
D. The author earned a lot of money at the cost of his dreams.
4. What’s the author’s feeling when he writes this passage?
A. Regretful. B. Enthusiastic. C. Sympathetic. D. Humorous.
高二英语阅读理解简单题查看答案及解析
阅读下面短文，根据所给情节进行续写，使之构成一个完整的故事。
As the sun shone through Poltu’s window, he was already wide awake in his bed. He got up and ran straight to his study table. There, in an empty jam bottle, was the treasure. A colorful little butterfly. How difficult it had been to catch it in the backyard of his house. It had kept flying away from his grasp. But catch it he did. And now it was going to be part of his biology project in school.
The biology project required Poltu to submit the study of a living creature every month. Most of his classmates drew diagrams from their books as part of this exercise. But Poltu was going to do something different. He was going to present a live creature—this butterfly.
Poltu loved the different colours on the wings of the butterfly. Red, green and blue. How beautiful it looked when it fluttered the wings. Poltu had made a few holes on the cap of the bottle to let air pass through, and added tender leaves for the butterfly to nibble (小口的咬) on. He might have trapped the creature, but he cared for it.
Excited about displaying his exhibit to the biology teacher, Poltu dressed hurriedly, and left for school. His school was walking distance from his house. He took a short cut and when he arrived, the gate wasn’t wholly open yet.
He walked straight into his class, opened the bench window and placed the bottle on the windowsill. The golden rays of the sun streamed through the glass, on the delicate wings of the butterfly. Poltu’s butterfly looked simply gorgeous. In a few minutes, the area was full of boys, even from other classes, gazing fondly at it.
That day’s biology class was the most interesting in a long time. Pleased with Poltu’s initiative (主动性), the teacher asked everyone in the class to thank him as he made it possible for them to study a butterfly so closely. Poltu felt like a star for being treated like royalty.
On the way home, whatever small creature Poltu came across, he felt like putting into the bottle. But he checked himself as he wanted to give breathing space to his butterfly.
注意：
1. 所续写短文的词数应为150左右；
2. 至少使用5个短文中标有下划线的关键词语；
3. 续写部分分为两段，每段的开头语已为你写好；
4. 续写完成后，请用下划线标出你所使用的关键词语。
Paragraph 1:
However, when he returned home, he found the butter fly not moving. ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Paragraph 2:
He ran outside, holding the bottle tightly in his hand.__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
高二英语读后续写困难题查看答案及解析
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
When the morning sun looks in through your bedroom window, do you jump out of bed? 1. An adequate amount of sleep can make the difference between a great day and a terrible one!
A good night’s sleep doesn’t just happen. You need to prepare for it. 2. First, go to bed at the same time every day, and get up at the same time. If you haven’t gotten a good night’s sleep, don’t oversleep the next morning. Get up at your regular time. Sleeping late for just a couples of days can change your body clock to a different cycle. You don’t want that if you have a set daily schedule.
Also, avoid big meals at night. 3. Your stomach works hard to digest those fatty foods, and that may keep you up.
Your body produces a chemical called melatonin (褪黑色素) that helps you sleep. Light affects the amount of melatonin your body makes. 4. So at night turn off your TV and computer. Also, don’t read from a backlit (背光) electronic equipment like an IPad. Some scientists think that the light from those stops your body from making melatonin. So turn those screens off at least an hour before bedtime.
Maybe you can’t sleep or you wake up in the middle of the night. 5. Get up and do something relaxing elsewhere. Then go back to bed when you feel sleepy again. If you worry a lot, make a list of things you need to do the next day.Do that an hour before bed. That way you get your worrying out of the way before you go to bed.
After a good night’s sleep, you’ll be able to face a new day.
A. Don’t just lie in bed.
B. You can have three meals a day.
C. Or do you roll over and complain?
D. Various experts have given tips to help.
E. Your TV and computers might affect your sleep.
F. It produces more in the evening and less in the daytime.
G. Eating heavy, rich foods within two hours of bedtime can keep you awake.
高二英语七选五中等难度题查看答案及解析
One October morning, the sky was clear and the sun was shining. Bethany Hamilton decided to go _______ with some friends in Hawaii.
As one of the best teenage surfers in the world, the 13-year-old, shy and old American girl was planning to become a _______ surfer. Cheerfully, she was lying on her surfboard, waiting for the next big wave. Suddenly-a big shark _______ her left arm and shook her backwards and forwards. Bethany held onto her board and the shark eventually swam away—but it took her _______ away with it. _______ it attacked only once. It happened so fast that she didn’t even _______.
As Bethany started to swim back to the beach with one arm, her friends thought she was joking. But to their horror, they saw the _______ and rushed to help.
Having lost almost half the blood, Bethany’s _______ was a miracle(奇迹), according to doctors. But she wanted to do _______ just survive.
“It never crossed my mind that I might never get on a surfboard again,” she recalled later. “I wondered whether I would actually be ________ to do it or not. But ________ I left hospital, I had decided that I was going to surf.”
With the support of her family, Bethany ________ to get back on her board only one month after the attack. Her dad fixed a handle on her surfboard to help her paddle(划水) through and into waves.
When she returned to surfing at a competition in Hawaii, Bethany was ________ in dangerous waves that broke her surfboard. As a result, she gave away her remaining boards and quit. She tried using an artificial arm, but it turned out to be ________ while surfing.
After ________ in Thailand in the 2004 earthquake and helping homeless survivors who had lost everything, Bethany ________ her decision to give up the sport she loved and ________ to try professional surfing again. Less than a year after the accident, she won first place in a surfing competition in Hawaii. And all her struggles and efforts ________when she won in a world championship years later.
She also received several ________, including a special award for courage at the MTV Teen Choice Awards in 2004 and the Woman of the Year award from King Fahd of Saudi Arabia in 2006. Her ________, true story gained wider attention with the release(发行）of the film Soul Surfer.
1.A. swimming B. boating C. sailing D. surfing
2.A. professional B. free C. dream D. special
3.A. touched B. struck C. bit D. took
4.A. arm B. surfboard C. friend D. hand
5.A. Strangely B. Especially C. Surprisingly D. Fortunately
6.A. think B. fight C. scream D. escape
7.A. shark B. blood C. attack D. scene
8.A. survival B. courage C. accident D. injury
9.A. rather than B. more than C. better than D. other than
10.A. suitable B. lucky C. strong D. able
11.A. while B. after C. before D. until
12.A. hoped B. managed C. agreed D. offered
13.A. caught B. noticed C. lost D. driven
14.A. helpful B. useless C. wonderful D. meaningless
15.A. training B. setting C. traveling D. volunteering
16.A. reconsidered B. remembered C. recognized D. recalled
17.A. refused B. started C. decided D. continued
18.A. paid out B. paid for C. paid in D. paid off
19.A. gifts B. honors C. rewards D. praises
20.A. exciting B. dangerous C. inspiring D. adventurous
高二英语完形填空中等难度题查看答案及解析
On an island in northern Norway, the sun doesn’t set from May 18 right through to July 26. The locals, having spent the long polar night from November to January, when the sun doesn’t rise at all, make the most of these months, with no regard to conventional timekeeping. The island intends to exchange its watches for flower garlands (花环) and declare itself the world’s first time-free zone (地区).
“There’s constant daylight, and we act accordingly,” says islander Kjell Ove Hveding in a statement. “In the middle of the night, which citizens might call ‘2 am’, you can spot children playing soccer, people painting their houses or mowing their lawns (草坪), and teens going for a swim.”
Now they want to make it official. Islanders gathered at a town hall meeting to sign a petition (请愿) for a time-free zone and on June 13, Hveding met with a Norwegian member of parliament (国会) to hand over the locals’ signatures and to discuss the practical and legal challenges.
“To us, getting this in writing would simply mean formalizing something we have been practicing for generations,” he says.
Islanders hope to be free of traditional opening hours and to introduce flexibility in school and working hours. Fishing and tourism are the main industries on this island with a population of little more than 300 people. Local fisher and women often spend days on the ocean for their catch, with little regard to timetable.
It’s clear that they mean business. When visitors cross the bridge to the island from the airland, they aren’t greeted with padlocks (symbolizing love locks) like on similar bridges worldwide. The bridge is covered with watches, as people prepare for entry to the land time forgot.
1.What do the islanders normally do at midnight from May 18 to July 26?
A.Struggle with strong light. B.Sleep like outside people.
C.Turn watches into flowers. D.Do daily work or have fun.
2.According to Hveding, the islanders’ living a life free of time ________.
A.is difficult to describe B.proves practical and legal
C.is a new kind of lifestyle D.has been a long tradition
3.What does the author mean by “they mean business” underlined in the last paragraph?
A.The islanders are serious about being free of time.
B.The islanders intend to treat tourism as business.
C.Visitors are ready to enter a time-free island
D.Visitors actually prefer watches on bridges.
4.What is the main idea of the text?
A.Islanders in Norway have been free from time.
B.An island wants to be a time-free zone officially.
C.It’s time to lead a life without the limit of time.
D.An island won’t be open to the world any longer.
高二英语阅读理解中等难度题查看答案及解析
It’s 5:00 in the morning when the alarm rings in my ears. I roll out of bed and walk blindly through the dark into the bathroom. I turn on the light and put on my glasses. The house is still as I walk downstairs while my husband and three kids sleep peacefully. Usually I go for a long run, but today I choose my favorite exercise DVD, Insanity.（疯狂60天健身） Sweat pours down my face and into my eyes. My heart races as I face my body to finish each movement. As I near the end of the exercise, I feel extremely tired, but a smile is on my face. It’s not a smile because the DVD is over, but a smile of success from pushing my body to its extreme limit.
Some people enjoy shopping, smoking , food, work, or even chocolate. But I need exercise to get through each day. Some shake heads when they see me run through the town. Others get hurt when I refuse to try just one bite of their grandmother’s chocolate cake. They raise their eyebrows, surprised by my “no thank you,” or by my choice to have a salad. Over the years , I have learned it’s okay to just say “no.” I shouldn’t feel sorry for refusing food that I don’t want to eat.
So what drives me to roll out of bed at 5:00 a.m.? What gives me the reason to just say no to ice cream? Commitment. A commitment to change my life with a way that reduces daily anxiety, increases self –confidence and energy, extends life and above all improves my body shape. This is the point where a smile appears on my face as I look at myself in the mirror or try on my favorite pair of jeans that now fit just right. It’s through commitment and sweat that I can make a difference within myself inside and out.
1.Why is there a smile on the author’s face in the morning?
A. Because she sees her family sleeping peacefully.
B. Because she feels a sense of achievement.
C. Because she enjoys the interesting DVD.
D. Because she finishes her favorite exercise.
2.What does the underlined word “commitment” in the last paragraph mean?
A. Good health. B. A strong power.
C. Firm belief. D. A regular habit.
3.What can we learn about the author from the text?
A. She acts in a strange way.
B. She wants to look different from others.
C. She has difficulty getting along with others.
D. She aims to develop a good body shape.
高二英语短文简单题查看答案及解析
It’s 5:00 in the morning when the alarm rings in my ears. I roll out of bed and walk blindly through the dark into the bathroom. I turn on the light and put on my glasses. The house is still as I walk downstairs while my husband and three kids sleep peacefully. Usually I go for a long run, but today I choose my favorite exercise DVD insanity. Sweat pours down my face and into my eyes. My heart races as I face my body to finish each movement. As I near the end of the exercise, I feel extremely tired, but a smile is of my face. It’s not a smile because the DVD is over, but a smile of success from pushing my body to its extreme limit.
Some people enjoy shopping, smoking, food, work, or even chocolate. But I need exercise to get through each day. Some shake heads when they see me run through the town. Others get hurt when I refuse to try just one bite of their grandmother’s chocolate cake. They raise their eyebrows, surprised by my “ no thank you,” or by my choice to have a salad. Over the years, I have learned it’s okay to just say “ no”. I shouldn’t feel sorry for refusing food that I don’t want to eat.
So what drives me to roll out of bed at 5:00 a.m.? What gives me the reason to just say to ice cream? Commitment. A commitment to change my life with a way that reduces daily anxiety, increases self –confidence and energy, extends life and above all improve my body shape. This is the point where a smile appears on my face as I look at myself in the mirror or try on my favorite pair of jeans that now fit just right. It’s through commitment and sweat that I can make a difference within myself inside and out.
1.Why is there a smile on the author’s face in the morning?
A. Because she sees her family sleeping peacefully.
B. Because she finishes her favorite exercise
C. Because she enjoys the interesting DVD
D. Because she feels a sense of achievement
2.Which of the following is true according to Paragraph 2?
A. She doesn’t treat others politely
B. She likes to make others surprised
C. Others don’t understand what she does
D. Others try to help her by offering her food
3.What does the underlined word “commitment” in the last paragraph mean?
A. Good health B. Firm belief
C.A strong power D.A regular half
4. What can we learn about the author from the text?
A. She acts in a strange way
B. She wants to look different from others
C. She aims to develop a good body shape
D. She has difficult getting along with others
高二英语阅读理解中等难度题查看答案及解析
It’s 5:00 in the morning when the alarm rings in my ears. I roll out of bed and walk blindly through the dark into the bathroom. I turn on the light and put on my glasses. The house is still as I walk downstairs while my husband and three kids sleep peacefully. Usually I go for a long run, but today I choose my favorite exercise DVD. Insanity. Sweat pours down my face and into my eyes. My heart races as I face my body to finish each movement. As I near the end of the exercise, I feel extremely tired, but a smile is on my face. It’s not a smile because the DVD is over, but a smile of success from pushing my body to its extreme limit.
Some people enjoy shopping, smoking , food, work, or even chocolate. But I need exercise to get through each day. Some shake heads when they see me run through the town. Others get hurt when I refuse to try just one bite of their grandmother’s chocolate cake. They raise their eyebrows, surprised by my “no thank you,” or by my choice to have a salad. Over the years , I have learned it’s okay to just say “no.” I shouldn’t feel sorry for refusing food that I don’t want to eat.
So what drives me to roll out of bed at 5:00 a.m.? What gives me the reason to just say no to ice cream? Commitment. A commitment to change my life with a way that reduces daily anxiety, increases self –confidence and energy, extends life and above all improves my body shape. This is the point where a smile appears on my face as I look at myself in the mirror or try on my favorite pair of jeans that now fit just right. It’s through commitment and sweat that I can make a difference within myself inside and out.
1.Why is there a smile on the author’s face in the morning?
A. Because she sees her family sleeping peacefully.
B. Because she finishes her favorite exercise.
C. Because she enjoys the interesting DVD.
D. Because she feels a sense of achievement.
2.What does the underlined word “commitment” in the last paragraph mean?
A. Good health. B. Firm belief.
C. A strong power. D. A regular habit.
3.What can we learn about the author from the text?
A. She acts in a strange way.
B. She wants to look different from others.
C. She aims to develop a good body shape.
D. She has difficulty getting along with others.
高二英语阅读理解简单题查看答案及解析
The first thing he does every morning is to read through the job offers in the newspapers.
A. advertised B. advertising
C. to be advertised D. being advertised
高二英语单项填空中等难度题查看答案及解析