There seems to be two causes as I try to figu...

There seems to be two causes as I try to figure out __________ that prevents so many children from being as happy as before.

A. how it is　　　　　　　　　　 B. when it is

C. what it is　　　　　　　　　 D. why it is

高三英语单项填空中等难度题查看答案及解析

When I try to understand ________ that prevents so many children from being happy, there seem to be three causes.

A. why it is　　 　　　　　　 B. what it does

C. why it does 　　　　　　 D. what it is

高三英语单项填空中等难度题查看答案及解析

When I try to understand ________ that prevents so many children from being happy, there seem to be three causes.

A. why it is　　         B. what it does　         C. why it does        D. what it is

高三英语单项填空困难题查看答案及解析

lt's a little hard to figure out the rules for sure,　 but the baby African buffalo( 7K午) seems to have the upper hand. The two stand a couple feet apart, staring at each other. Behind them, their mothers look on with the kind of indifference(不关心) of mothers everywhere who see their kids playing a harmless game.

The alarm went off about half an hour ago, the second time tonight. Here, one bell means “elephant”, two, “rhino” (犀牛), and three and four, 1 really can't remember for what, because when you're awoken by bells in the middle of the night, your first thought won't be “Animal! ”.　 But as soon as I realized it was the rhino alarm, I was running for the stairs.

Yet I'm the only one watching the animals stare-down. Either everyone else died of a heart attack when the bells went off, or l was the only one in the entire hotel who didn't turn the alarm switch to off before going to bed.

The Ark,　 a hotel shaped like the biblical ark(圣经的方舟) , lies in the highlands of Kenya's Aberdare National Park, about 100 kilometers north of Nairobi. At the Ark's prow(船首) are huge windows overlooking a waterhole. Earlier tonight, I'd watched a pack of wolves, buffalos and elephants. And now, at three or so in the morning, I'm down for rhino bells. The first time, 2. 5 hours ago, it was a single black rhino, which came down, got a drink, and left.

I'd have been sorry for the lost sleep.　 I've already arranged with a guide to take me out at sunrise for the so-called “should_never_miss” bird-watching, where we'll get to see 30 species, but really, how many times in your life will you get to wake up and say, “Wow! Rhino!”? Isn't that the definition of a pretty good night? Last week we went from Uganda into Kenya.　 Before I left home, 1 thought I'd be happy with ten elephants and five or six giraffes on the whole trip. I didn't dare to dream the rhino.

1.The message that the hotel's bells sent was ___________.

A. a very wise way the author had never heard of

B. hard for the author to remember in detail

C. a matter that all visitors had got used to

D. like conditioned response training for animals

2.What's the author's attitude toward the bell?

A. It's bothering but two bells are welcome.

B. It should be turned off whenever it rings.

C. It lets visitors have a chance to see buffalos.

D. It is a very bad way to wake the guests up.

3.What can we learn from the passage?

A. The author hates all the animals.

B. There are lots of wild animals near the Ark.

C. The author slept well during the whole trip.

D. The author has no interest in thinos.

4.What did the author see at about 3:00 a.m. ?

A. Two buffalos were fighting fiercely for food.

B. A rhino and a buffalo were fighting for water.

C. A rhino and a buffalo were staring at each other.

D. A buffalo was teaching its baby to walk freely.

高三英语阅读理解中等难度题查看答案及解析

It's a little hard to figure out the rules for sure but the baby African buffalo (水牛）seems to have the upper hand. The two stand a couple　 feet apart, staring at each other. Behind them, their mothers look on with the kind of indifference (不关心）of mothers everywhere who see their kids playing a harmless game.

The alarm went off about half an hour ago, the second time tonight. Here，one bell means "elephant ",two "rhino"(犀牛），and three and four，I really can't remember for what，because when you' re awoken by bells in the middle of the night，your first thought won’t be Animal", But as soon as I realized it was the rhino alarm, I was running for the stairs.

Yet I'm the only one watching the animals stare-down. Either nobody else died of a heart attack when the bells went off, or I was the only one in the entire hotel who didn't turn the alarm switch to off before going to bed.

The Ark, a hotel shaped like the biblical ark(圣经的方舟), lies in the highlands of Kenya’s Aberdare National Park, about 100 kilometers north of Nairobi. At the Ark's prow (船首) are huge windows overlooking a waterhole. Earlier tonight，I'd watched a pack of wolves, buffalos and elephants. And now, at Three or so in the mornings　 I'm　 down　 for　 the round of rhino bells. The first time, 2.5 hours ago, it was a single black rhino, which came　 down, got a　 drink, and left.

I'd have been sorry for the lost sleep. I've already arranged with a guide to take me out at sunrise for the so-called "should-never-missed" bird-watching, where well get to see 30 species, but really, how many times in your life will you get to wake up and say，"Wow! Rhino? Isn't that the definition of a pretty good right? Last week we went from Uganda into Kenya，Before I left home, I thought I'd be happy with ten elephants and five or six giraffes on the whole trip.I　 didn't dare to dream the rhino.

1.The message that the hotel's bells sent was 　　　　 .

A. a very wise way the author had never heard of

B. hard for the author to remember in detail

C. a matter that all visitors had got used to

D. like conditioned response training for animals

2.What's the author's attitude toward the bell?

A. It's　 bothering but two bells are welcome.

B. It should be turned off whenever it rings,

C. Its visitors have a chance to see buffalos.

D. It is a very bad way to wake the guests up.

3.What does the underlined part “died of a heart attack" in paragraph 3 mean ?

A. died unexpectedly

B. felt extremely excited

C. felt very uncomfortable and tired

D. suffered from a terrible heart attack

4.What did the author see at about 3:00　 a.m.?

A. Two buffalos were fighting fiercely for food,

B. A rhino and a buffalo were fighting for water.

C. A rhino and a buffalo were staring at each other.

D. A buffalo was teaching its baby to walk freely.

高三英语阅读理解困难题查看答案及解析

All over the world there seems ________people out of work nowadays.

A．to have a great many　     　　 B．to be a great many

C．to have a great many of　     D．to be a good many of

高三英语单项填空中等难度题查看答案及解析

.The two ladies are _______ the same age, but there seems to be ten years _______ them.

A. at; between     B. about; among      C. as; among       D. of; between

高三英语单项填空简单题查看答案及解析

One step too far

Scientists have been trying to figure out how to alter the genes of humans for many years now, and it looks like they've finally cracked (破解) the code. But while this may seem like a great step forward in science, some also believe that it's one step back when it comes to ethics.

In August, a group of scientists from the US and South Korea worked together to successfully edit a human embryo and remove a genetic mutation (突变) that would have led to heart disease, reported The Guardian.

This was achieved with the help of CRISPR, a gene-editing tool that allows scientists to “cut and paste” human DNA.

Although this was the first example of an embryo's genes being changed successfully, the benefits of gene editing have already been tested in living patients.

In 2015, a five-month-old girl from the UK was saved after doctors used edited cells to fight off her cancer. As of today, she's alive and well.

And in the US last year, scientists managed to remove HIV cells from several patients by editing the genes inside their bodies.

Some people hope that in the future, diseases or birth detects could simply be “edited out”. However, others believe this could lead to so-called designer babies, giving parents the option to choose everything from eye color to intelligence.

“You could find wealthy parents buying the latest ‘upgrades’ for their children, leading to even greater inequality than we already live with,” Marcy Darnovsky, director of the San Francisco Center for Genetics, told BBC News.

In spite of these ethical concerns, experts say it’s not possible to create the “perfect” human being. Despite the progress scientists have made, we don’t understand human genes enough to give all unborn child great brainpower or amazing singing abilities.

“Right now, we know nothing about genetic enhancement,” Hank Greely, a director of sciences at Stanford University, US, told The New York Times. “We’re never going to be able to say, honestly, ‘This embryo looks like it would score high on the two-part SAT.’”

So it looks like if we want good exam results, or to impress people with our piano skills, we’ll have to stick with the old fashioned method of plain hard work — at least for now.

1.The underlined word “alter” in Paragraph 1 probably means ______.

A.record

B.change

C.remove

D.increase

2.Why do some people consider human gene editing a step backwards？ ______

A.They don't think it is an effective way to light diseases.

B.They are concerned that it could lead to genetic mutations.

C.They think it could lead to designer babies and increased inequality.

D.They worry that it could make parents abandon children with birth defects.

3.What was the first successful example of human embryo gene editing？ ______

A.A genetic mutation related to heart disease was removed by scientists

B.A newborn baby with cancer was saved by edited cells.

C.HIV cells were removed from patients’ bodies.

D.Some birth defects were simply edited out.

4.What can we conclude from the text？ ______

A.Gene editing is regarded as the perfect way to treat birth defects.

B.There is still a long way to go to fully understand human genes.

C.Gene editing could help enhance human intelligence in the near future.

D.Scientists are pessimistic about the future of gene editing.

高三英语阅读理解困难题查看答案及解析

When you were trying to figure out what to buy for the environmentalist on your holiday list, fur probably didn’t cross your mind. But some ecologists and fashion (时装)enthusiasts are trying to bring back the market for fur made from nutria(海狸鼠).

Unusual fashion shows in New Orleans and Brooklyn have(showcased)nutria fur made into clothes in different styles. “It sounds crazy to talk about guilt-free fur-unless you understand that the nutria are destroying vast wetlands every year”, says Cree McCree, project director of Righteous Fur.

Scientists in Louisiana were so concerned that they decided to pay hunters $5 a tail. Some of the fur ends up in the fashion shows like the one in Brooklyn last month.

Nutria were brought there from Argentina by fur farmers and let go into the wild. “The ecosystem down there can’t handle this non-native species(物种).It’s destroying the environment. It’s them or us.” says Michael Massimi, an expert in this field.

The fur trade kept nutria check for decades，but when the market for nutria collapsed in the late 1980s，the cat-sized animals multiplied like crazy.

Biologist Edmond Mouton runs the nutria control program for Louisiana. He says it’s not easy to convince people that nutria fur is green, but he has no doubt about it. Hunters bring in more than 300,000 nutria tails a year, so part of Mouton’s job these days is trying to promote fur.

Then there’s Righteous Fur and its unusual fashion. Model Paige Morgan says，”To give people a guilt-free option that they can wear without someone throwing paint on them-1 think that’s going to be a massive thing, at least here in New York.” Designer Jennifer Anderson admits it took her a while to come around to the opinion that using nutria fur for her creations is morally acceptable. She trying to come up with a lable to attach to nutria fashions to show it is eco-friendly.

1.What is the purpose of the fashion shows in New Orleans and Brooklyn?

A.To promote guilt-free fur.

B.To expand the fashion market.

C.To introduce a new brand.

D.To celebrate a winter holiday.

2.Why are scientists concerned about nutria?

A.Nutria damage the ecosystem seriously.

B.Nutria are an endangered species.

C.Nutria hurt local cat-sized animals.

D.Nutria are illegally hunted.

3.What does the underlined word “collapsed” in paragraph 5 probably mean?

A.Boomed. B.Became mature. C.Remained stable. D.Crashed.

4.What can we infer abouf wearing fur in New York according to Morgan?

A.It’s formal. B.It’s risky. C.It’s harmful. D.It’s traditional.

高三英语阅读理解困难题查看答案及解析

For many days I have been trying to　 what it is that makes Jack so annoyed.

A. carry out B. figure out

C. watch out D. stand out

高三英语单项填空中等难度题查看答案及解析