题目内容

【题目】The desk that ____clean so I could do homework was always surrounded with bowls of bad milk, old magazines and so on.

A.may have been

B. would have been

C. must have been

D. should have been

【答案】D

【解析】考查情态动词和虚拟语气。根据that从句可知,本题主句的谓语是was always surrounded。主句陈述过去的客观事实,从句用与过去相反的虚拟语气,为“本应该”所以选择D。本题题意:那个桌子本来应该被收拾得干干净净,我在上面写作业的,它却堆满了过期牛奶的瓶子和旧杂志等。故D正确。

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【题目】概要写作

阅读下面短文,根据其内容写一篇60词左右的内容概要。

Bad news sells.If it bleeds,it leads.No news is good news,and good news is no news.Those are the classic rules for the evening broadcasts and the morning papers.But now that information is being spread and monitored (监控) in different ways,researchers are discovering new rules.By tracking people’s emails and online posts,scientists have found that good news can spread faster and farther than disasters and sob stories.

“The ‘if it bleeds’ rule works for mass media,” says Jonah Berger,a scholar at the University of Pennsylvania.“They want your eyeballs and don’t care how you’re feeling.But when you share a story with your friends,you care a lot more how they react.You don’t want them to think of you as a Debbie Downer.”

Researchers analyzing wordofmouth communication—emails,Web posts and reviews,facetoface conversations—found that it tended to be more positive than negative(消极的),but that didn’t necessarily mean people preferred positive news.Was positive news shared more often simply because people experienced more good things than bad things? To test for that possibility,Dr.Berger looked at how people spread a particular set of news stories: thousands of articles on The New York Times’ website.He and a Penn.colleague analyzed the “most emailed” list for six months.One of his first findings was that articles in the science section were much more likely to make the list than nonscience articles.He found that science amazed The Times’ readers and made them want to share this positive feeling with others.

Readers also tended to share articles that were exciting or funny,or that inspired negative feelings like anger or anxiety,but not articles that left them merely sad.They needed to be aroused(激发) one way or the other,and they preferred good news to bad.The more positive an article was,the more likely it was to be shared,as Dr.Berger explains in his new book,Contagious:Why Things Catch On.

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【题目】Paleontologists(古生物专家) at the University of Alberta have developed a new theory to explain why the ancient ancestors of dinosaurs stopped moving about on all fours and rose up on just their two back legs.

Bipedalism(双腿直立行走) in dinosaurs was inherited from ancient and much smaller proto-dinosaurs. “The tails of proto-dinosaurs had big, leg-powering muscles,” says Persons. Having this muscle mass provided the strength and power required for early dinosaurs to stand on and move with their two back feet.

Over time, proto-dinosaurs developed to run faster and for longer distances. Adaptations like longer back legs allowed ancient dinosaurs to run faster, while smaller front legs helped to reduce body weight and improve balance. Eventually, some proto-dinosaurs gave up walking on fours altogether.

The research, conducted by Persons and Phil Currie, paleontologist and Canada Research Chair, also debunks(揭穿真相) theories that early proto-dinosaurs stood on two legs for the only purpose of free their hands for use in catching food. “Those explanations don’t stand up,”says Persons. It is more likely they seized their meals with their powerful jaws.

If it is true that bipedalism can develop to help animals run fast, why aren’t mammals like horses bipedal? “Largely because mammals don’t have those big tail-based leg muscles”, Persons explains. “Looking across the fossil record, we can trace when our proto-mammal ancestors actually lost those muscles. It seems to have happened back in the Permian period, over 252 million years ago.”

The researchers also claim that living in caves may have helped our ancestors to survive a mass extinction that occurred at the end of the Permian. But when proto-mammals came out from their caves, and some eventually developed to be fast runners, they lacked the tail muscles that would have helped them towards bipedalism.

【1】What helped dinosaurs walk with two back legs actually?

A. Big tail-based leg muscles.

B. Strong and powerful jaws.

C. The ability of improving balance.

D. Four legs with leg-powering muscles.

【2】Which of the following would Persons and Phil Currie agree with?

A. Our ancestors always had big tail-based leg muscles.

B. Ancient dinosaurs’ back legs helped to reduce body weight.

C. Many kinds of animals may have died out in the Permian period.

D. Most animals could stand on two legs with tail-based leg muscles.

【3】What’s the main idea of the text?

A. What bipedalism really means to mammals.

B. What caused dinosaurs to become movable.

C. How ancient dinosaurs actually lived in caves.

D. How dinosaurs learned to stand on their own two feet.

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