"Just because you can't see something, that d...

You may have heard of the popular saying, “Practice makes perfect.” But have you ever wondered whether it's really true? Does practice always make perfect?

Sometimes practice does make perfect. Take a math test for example. If you know you're going to have a math test in a week, you can keep doing math exercises before the test. If you get a full mark on your test, that's perfect and you can say the practice helped get you there.

However, in some other fields of life, practice doesn't always make perfect. It doesn't mean that practice is useless. Sometimes it just means that there's no such thing as "perfect in a certain field. For example, if you play sports or a musical instrument, there are no perfect games or perfect shows. It all depends on what you consider to be perfect."

Even if practice doesn't always make perfect, it almost always makes you better than you were before practicing. The more you practice something, the better you are at it.

1.The writer takes a math test for example to ________.

A.explain what is perfect B.encourage us to practice less

C.show practice can help us a lot D.make us believe nothing is perfect

2.Why doesn't practice make perfect sometimes?

A.Because practice is useless. B.Because there isn't a certain standard.

C.Because life is difficult for us. D.Because we can never get a full mark.

3.What does the writer talk about in the text?

A.Practice never makes perfect. B.It's easy and fun to be perfect.

C.How to practice for perfection? D.Does practice always make perfect?

九年级英语阅读单选中等难度题查看答案及解析

The idea that red means stop and green means go has influenced our lives in more ways than just traffic signals(信号). We have been taught from a young age that the color red means danger and green means it's okay to move forward. But why were those colors chosen for traffic lights in the first place? For something we have to look at every day, why couldn't they have been prettier colors?

Well, it's important to know that before traffic lights for cars, there were traffic signals for trains. At first, railway companies used red to mean stop, white to mean go, and green to mean warn. As you could imagine, trains ran into a few problems with white meaning go. For example, one train mistook a bright star for a white light and something unexpected happened. Because of that, railway companies finally moved green meaning go and used yellow to mean warn. And it's been that way ever since.

Red has always been a color that meant danger, long before cars were even around. This most likely started because it's the color with the longest wavelength(波长) so it can be seen somewhere farther than other colors.

But, believe it or not, yellow was once used to mean stop. Back in the 1900s, some stop signs were yellow because it was too hard to see a red sign in a poorly lit area. Finally, highly reflective materials(高反射材料) were developed and red stop signs were born. Since yellow can be seen well at all times of the day, school zones, some traffic signs, and school buses continue to be painted yellow.

So next time you're impatiently waiting at a traffic light, don't get so mad at them, they've certainly come a long way.

What does the text mainly tell us?

A.How important traffic lights are.

B.Which color has the longest wavelength.

C.What red, yellow and green can be used for.

D.Why traffic lights are red, yellow and green.

九年级英语阅读单选中等难度题查看答案及解析

What can help us when we fail?

◆ Don’t make yourself stop trying.

A baby learns to walk not by walking, but by falling. He doesn’t give up until he learns to walk.1.Sometimes, you may feel sad because you don’t make much progress. But if you give up, your progress will come to an end.

◆ Understand the power of optimism (乐观).

2.. To be optimistic(乐观的) means to believe something good will always happen. Kids don’t ask whether they can do something or not, because they know they can.

◆ 3.

Those who are independent(独立的) can deal with problems and stress more easily than those who aren’t. And you should be more confident to be independent.

◆ Don’t look back.

It takes adults too much of their lives to look back.4. A baby wouldn’t learn to walk if he kept looking behind himself while trying to move forward. Use just 10 percent more of your time to look forward and you’ll find yourself in a better condition.

Failure is a part of life since the earliest moment of life. It’s a normal and natural part of life that is neither bad nor good---it’s just how we learn. So the question isn’t whether you want to fail or not, but how quickly you can accept your failure. Just learn something from it, and try again.

根据短文内容，从下列选项中选出能填入文中空白处的最佳选项，选项中有一项为多余选项。

A.Be more confident than before.

B.There’s nothing back there to see.

C.Learn to depend on yourself first, then others.

D.You can do something new successfully if you keep trying.

E.Optimism can open you up to more possibilities than usual.

九年级英语补全短文5选4中等难度题查看答案及解析

"Just because you can't see something, that doesn't mean it's not there. "This old saying is quite meaningful for British sculptor（雕刻家） Willard. The items he creates are so small that most of them fit on the head of a pin. You can see them clearly only through a microscope（显微镜）.

Many people want to own his art pieces. He's been honored by the Queen of England for his great art achievements. At every one of his exhibitions, the question is always the same. How does he do it?

The answer is very, very carefully. So carefully, in fact, that he actually slows his breathing down and works in between breaths. Willard usually works under a microscope using special tools that he creates. To paint his works, he uses the hair from a fly as a paintbrush.

Creating these detailed works is a very long and difficult process, and it isn't always enjoyable." It is a terrible dream when I start but a nice dream when I finish," he says. A single item can take at least several weeks to complete.

People have asked Willard why he chose to do something that needed effort and took time. His interest in creating small things began when he was five. He started creating houses and playgrounds for ants. Willard was not a strong student. He had difficulty in reading and spelling words. Some kids used to call him a loser. This made him feel small, so focusing on lite things helped him to feel big. The smaller his work got, the bigger he felt. A newspaper reporter said, "Willard has shown the world that he is special. Though_______ , he________."

1.Are Willard's art pieces big or small in size?

__________________________________________

2.When people visit Willard's exhibitions, what question do they always ask?

__________________________________________

3.What does Willard use to make a paintbrush?

___________________________________________

4.What does the underlined word it in paragraph 4 refer to?

___________________________________________

5.Why did Willard choose to do something that needed effort and took time?

___________________________________________

6.What can be filled in the blanks in the last paragraph?

___________________________________________

九年级英语回答问题中等难度题查看答案及解析

You might have noticed that sometimes, when you're playing mobile games or making a video call, the picture suddenly freezes (卡顿) because the network speed is too slow. When you try to download a movie on your phone, it seems to take forever.

These annoying things will soon become things of the past, as China just issued commercial licenses (发放商业牌照) for 5G networks on June 6. This means that China's telecommunications (电信) companies will be able to offer 5G network speeds for mobile phone users.

The "G" stands for generation (代). 1G let us talk to each other, 2G let us send messages, 3G gave us mobile data and Internet, and 4G made all of these things faster. So what will 5G bring?

First of all, 5G is so fast that it will allow us to download an entire HD movie in a second. The delay (延时) between sending and receiving data will be shortened. Now, 4G takes about 100 to 200 milliseconds (毫秒), while humans have a reaction time of about 200 to 300 milliseconds. But 5G will get the delay down to 1 millisecond or less, which is almost real-time.

Because of this increase in speed, it will possible to create and use new kinds of technology. Robots will be used to do operations because doctors will be able to control them from somewhere else without any delay. Self-driving cars will be able to drive more safely because they can smoothly communicate with other cars, traffic lights and road sensors (传感器). 5G also makes the Internet of Things (IOT, 物联网) possible.

All in all, 5G will shape every type of technology that it touches. And you won't have to wait too long for that to happen.

1.From the first paragraph that ________.

A.people can't download a movie at all on the phone

B.making a video call is impossible for phone users

C.sometimes the network speed is too slow to use

D.mobile games can't be downloaded on the phone

2.What happened on June 6 according to the passage?

A.China just gave commercial licenses officially for 5G networks.

B.Every mobile phone user could improve the network speed.

C.Most mobile phone users didn't use 4G anymore.

D.All the mobile phones are much cheaper than before.

3.The underlined word "them" refers to "___________".

A.operations B.robots C.5G phones D.speeds

4.Which of the following is NOT true according to the passage?

A.5G will make people's life much easier and more convenient.

B.Self-driving cars will become safer because of the use of 5G.

C.Using 5G to download something doesn't take any time at all.

D.5G can make people download an entire HD movie in a second.

九年级英语阅读单选中等难度题查看答案及解析

Have you ever been sad because you failed in something? If so, please remember, for often, achieving what you expect is not the most_____thing.

One day, after watching a science program, a little boy_____to dig a hole behind his house. As he was working, a couple of boys stopped by to watch. "What are you doing?" asked one of them. "I want to dig a hole all the way through the_____!" the boy answered excitedly. The older boys laughed and told him that it was impossible to do it. Then they left.

The little boy kept on digging and digging. Suddenly, a few small colorful stones caught his eyes. He_____them and put them into a glass jar (罐子) patiently. The jar was full soon. Then the boy went to the older boys with the jar and said_____, "Maybe I can't finish digging all the way through the earth, but look at what I have found in the process (过程) of digging!"

The boy's goal was too difficult, but it caused him to_____, in other words, to cause us to keep working!

Not every goal will be achieved. When you can't achieve your goal, maybe you can say, "Yes, but there are so many wonderful things that have come into my life_____I tried to do something!" It is the unexpected joy on the journey that really has a_____. Just like the little boy, it is in the digging that life is lived.

1.A.traditional B.important C.difficult

2.A.refused B.needed C.decided

3.A.house B.hill C.earth

4.A.collected B.threw C.dropped

5.A.angrily B.proudly C.politely

6.A.give up B.come out C.go on

7.A.because B.before C.whether

8.A.problem B.meaning C.choice

九年级英语完型填空中等难度题查看答案及解析

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。

Most of us don’t think about food until we start feeling hungry, but eating is important in life. To talk about food and eating is to talk about one of the most common subjects we know. Eating is just like breathing or sleeping every day.1.

However, what, where, when, how, and with whom we eat say a great deal about who we are. Do you use chopsticks? Do you hold the knife backward? Do you chew with your mouth open?

2. They are messages even when we are not trying to say anything. Food and the ways we eat it, like clothes and the way we wear them, tell who and what we are.

3.　 We usually have strong feelings about our childhood foods. Foods we learn to like in our early years probably have a special meaning for us forever because they are connected to people and things we love. Mom’s cheese or the way Dad cuts the bread crusts just right bringing up feelings of love and comfort.

People use food and eating to mark the seasons and the important moments in life (such as growing up and getting married).4.Sometimes people even explain why they eat certain things on certain days. Americans do that sort of explaining at Thanksgiving. They eat Turkey, com, and Indian pudding because their ancestors ate them at the first Thanksgiving. Those foods mean something to Americans.

As you can see, food and eating mark people’s shared experiences, but they can also mark the differences.5.

A.In that sense, we truly are what we eat.

B.It’s so ordinary that it doesn’t receive much notice.

C.People will eat different foods for different holidays.

D.Your health will be decided by what you eat.

E.We learn our eating habits very early in life.

F.The food we eat helps us grow in different ways.

G.All these eating habits say something about you.

九年级英语补全短文7选5简单题查看答案及解析

Candy: the not-so-sweet story

Your parents warn you not to have too much sugar, but you think, "So what? It is just a small candy. 1. "

One candy is fine, but things can quickly get out of hand if you are not careful, and the result may not be so sweet.

Did you know that candy was used as medicine at first? Ancient Egyptians and Greeks used honey-coated fruits, nuts and flowers to treat digestive disorders (消化失调). 2.

3. Real sugar comes from plants such as sugarcane and sugar beets. The sugar in candy is artificial (人造的). It not only has nothing healthy, but causes blood sugar to go up.

The clearest harm is to our teeth because candy provides easily digestible energy for the bad bacteria (细菌) in our mouth. 4. Not surprisingly, people who have a lot of sugar are most likely to become overweight. This is true for all age groups, especially for children. In addition, sugar can lead to serious problems such as cancer and other illnesses.

So, as you can see, too much of a good thing can be bad. Cut down on sugar and you will find yourself doing better in school and sleeping better at home! Just remember, "You are what you eat."

A.Even as late as 18th century, candy was used for people with digestive problems.

B.Candies are popular with children.

C.It can't possibly do much harm.

D.Unexpectedly, candy doesn't even have real sugar in it.

E.Sugar also sends a message to our brain and body that it is OK to take more.

九年级英语补全短文5选4中等难度题查看答案及解析

Has anyone ever told you that eating carrots will help you see in the dark? This is just one of many incorrect beliefs you may have heard. Below, TEENS has picked out scientific explanations for three mistakes that people make about their eyes. Let's take a look.

Can eating carrots improve your eyesight?

Carrots are rich in vitamin A, which helps the eyes to turn light into information for your brain. This allows people to see in darker places. However, eating more carrots won't help you see better. A certain minimum amount will help, but a large number of carrots will not give you superhuman vision.

If your parents have bad eyesight, will you have bad eyesight, too?

Myopia( 近 视 ) can be passed from parents to children. A study by the American Optometric Association found that if both parents are myopic, there's a 33 to 60 percent chance that their child will be. For children who have one parent with myopia, the chance is 23 to 40 percent, and it's down to 6 to 15 percent for kids with non-myopic parents. So if your eyesight is bad, your children might still have good vision.

Do color blind people see the world in black and white?

Color blindness doesn't usually mean that people see the world like an old movie. They usually can't tell certain colors apart, especially green and red. Another commonly confused pair of colors is yellow and blue. Our eyes have cone cells (视锥细胞) that sense different wavelengths of light. If these cells don't work properly, color blindness occurs. There are different levels of color blindness. Some people are only color blind in low light. However, in the most serious form of color blindness, everything is shades of gray.

1.According to the article, eating carrots________.

A.stops the brain from seeing B.doesn't help you see better at all

C.will help you see clearly in the dark D.is good for your eyes to some degree

2.If both parents have myopia, their child's chance of having good eyesight is________.

A.40-67% B.33-60% C.23-40% D.6-15%

3.The underline word“occurs”in this passage probably means________.

A.恶化 B.发生 C.改善 D.加深

4.What is the cause of color blindness according to the text?

A.Watching movies for too long . B.Getting too little exercise.

C.Cone cells not working properly. D.Changes in the wavelength of light.

5.What is the purpose of the article?

A.To offer some advice on protecting your eyes.

B.To clear up some misunderstandings about our eyes.

C.To provide help for improving your vision.

D.To explain how bad eyesight and color blindness form.

九年级英语阅读单选中等难度题查看答案及解析

Most of us don't like about food until we start feeling hungry, but eating important in life. To talk about food and eating is to talk about one of the most common subjects we know. Eating is just like breathing or sleeping, so every day, so ordinary, it does not receive much notice.

However, what, where, when, how, and with whom we eat say a great deal about who we are. Do you use chopsticks? Do you hold the knife backward? Do you chew with your mouth open? All these eating habits say something about you. They are messages even when we are not trying to say anything. Food and the ways we eat it, like clothes and the way we wear them, tell who and what we are.

We learn our eating habits very early in life. We usually have strong feeling about our childhood foods. Foods we learn to like our early years probably have a special meaning for us forever because they are connected to people and things we love. Mom's cheers or the way Dad cuts the bread crusts just right bringing up feelings of love and comfort.

People use food and eating to mark the seasons and the important moments in life （such as growing up and getting married）, or to honor gods, and to say something about themselves. People will eat different foods for different holidays. Sometimes people ever explain why they eat certain things on certain days. Americans do that sort of explaining at Thanksgiving. They eat Turkey, corn, and Indian pudding because their ancestors（祖先）ate them at the first Thanksgiving. Those foods mean something to Americans.

As you can see, food and eating mark people's shared experiences, but they can also mark the differences. In the sense, we truly are what we eat.

1.You can probably read the article from a magazine about _______________.

A.traveling B.food and culture

C.clothes and fashion D.sports

2.Why do people have strong feeling about childhood foods?

A.Because the foods may connect to the beloved people or things.

B.Because most of the people like eating cheese and bread.

C.Because the cheese made by Mom and Dad tastes delicious.

D.Because people learn the eating habits very early.

3.Which of the following shows the proper structure of this passage?

A. B. C. D.

4.What does the sentence "we truly are what we eat" mean according to the passage?

A.We need to eat healthy food to keep fit. B.The way we eat tells a lot about us.

C.We eat some special food on special days. D.It's the food that makes us different.

九年级英语阅读单选困难题查看答案及解析