题目内容

(题文)He asked me whom I ________ for.

A. am waiting B. wait C. will wait D. was waiting

D 【解析】 句意:他问我在等谁?这是宾语从句的结构,当主句是过去时态时,从句用过去的某一个时态,根据句意可知这里用进行时态;故选D。
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Bats are the only mammals that can fly a great distance, but they have another ability. Many bats live a very long time for an animal their size.

European researchers are studying bats to understand why they live so long. They hope to make discoveries to fight the aging process (过程) in human beings.

Last week, the group of scientists said they had found important biological qualities in some bat species. The group studied bat chromosomes (染 色 体), a line of genes found in the nucleus(核) ofcells. The scientists were most interested in parts connected to the ends of the chromosomes. They are called telomeres(端 粒). Telomeres protect the ends of chromosomes, which shorten each time a cell divides. Scientists believe this shortening process causes cells to break down. .

A report on bats was published this month in the journal Science Advances.

Among the leaders of the study was Emma Teeling, a biologist with University College Dublin in Ireland. Teeling said studying long-living mammals that have developed ways to fight aging “is another way to prove the molecular(分 子) basis of extended ‘health length.’” She added that studying bats made scientists able to learn more about the processes “that drive healthy aging.”

The European researchers studied 493 bats from four bat species. The group used information that had been gathered over more than 60 years. Of these animals, the greater mouse-eared bat generally lived the longest, an average of 37 years.

The scientists said this and a related species, which are grouped together under the name Myotis, had telomeres that did not shorten with age. Another Myotis bat holds the record for oldest age, reaching 41 years.

The scientists’ findings suggest that these bats’ cells have the ability to keep and repair their telomeres. This, they said, helps guard against the aging process. Based on its body size, a bat like the greater mouse-eared bat would be expected to live four years. But, these mammals have been found to live nearly 10 times longer than that.

The scientists found that Eighteen of these are bats. The only exception is an unusual African rodent, the naked mole rat.

1.Which sentence can be put at the end of Paragraph 3?

A. This makes scientists able to study bats.

B. That’s why bats can fly a great distance.

C. They say this is what causes aging.

D. They discover the cells connected to humans.

2.Why do some species of bats live a very long time?

A. Because they have a line of long-living genes out of the cells.

B. Because their cells have the ability to keep and repair their telomeres.

C. Because they have another ability to live longer without any food or water.

D. Because telomeres protect the ends of chromosomes to stop cells dividing.

3.The underlined word “that” refers to .

A. four years B. body size C. the aging process D. the ability to repair

4.What’s the best title of the passage?

A. Differences Between Long-Living Animals

B. A Science Report on Chromosomes

C. Do Bats Hold the Secret to Long Life?

D. Are Humans and Bats Similar in Protecting Themselves?

1.C 2.B 3.A 4.C 【解析】文章讲述了蚂蚁是个长寿的动物的事情。 1.根据Scientists believe this shortening process causes cells to break down可知这就是引起老化的东西;故选C 2.根据The scientists’ findings suggest that these bats’...

Do you ever throw away food at home? Have you ever thought about what happens to the food that shops and supermarkets don’t sell? Well, you might be shocked (震惊) to find out that nearly one third of food produced for human gets lost or wasted. What’s more, around 800 million people in the world do not have enough food to lead a healthy life.

Many people in the UK and across the world are trying to do something about this imbalance and make use of thrown-out food that can be perfectly eaten. For example, there is a cafe in Leeds (UK) whose meals are all created using unsold food from supermarkets, including a lot of vegetables, fruit, fish and other things. This unwanted food is turned into delicious soups and all kinds of dishes that feed the hungry people of Leeds. Customers simply pay what they can afford, or help with the washing up. In just ten months, 10,000 people were fed at this cafe, using twenty tons of unwanted food!

Also, last year the UK’s first food waste supermarket opened. The supermarket is near Leeds and works on a “pay as you feel”; customers pay whatever they want for the produce. The stock (库存) changes daily but you can usually find things such as fresh vegetables, fruit and milk there. Some low-income families have said that it has changed their lives.

“Fuel for School” is another food waste project. Surplus (多余的) food from supermarkets such as vegetables, fruit and bread is used to feed hungry schoolchildren whose families may not be able to afford to buy them lunch.

I lived in Leeds for three years, and have had lunch at a food waste cafe, and it was delicious. I couldn’t believe that it was all food that supermarkets had thrown away! I have also taken part in projects such as “Foodcycle”, using supermarkets’ unwanted food to cook meals for poor people.

More cafes like this are being opened in other parts of the UK, and it is now becoming popular in the world. I think this is an amazing act as food waste is one of the world’s biggest problems. I also believe that the law should be changed, so that supermarkets don’t throw away so much perfectly good food!

1.800 million people in the world can’t live a healthy life because of ______.

A. unsold food B. unwanted food

C. being unable to work D. being short of food

2.According to the passage, the writer agrees that ______.

A. buying the waste food can protect the environment

B. all the people in the world make use of waste food

C. food waste in the world can be solved by the UK soon

D. the government should make the law to stop food waste

3.What is the writer’s main purpose in writing this passage?

A. To encourage people to save food.

B. To introduce some supermarkets in the UK.

C. To share his personal experience in saving food.

D. To explain why he cooked meals for poor people.

1.D 2.D 3.A 【解析】本文介绍了现在世界上食物浪费严重,但是仍有很多人食物短缺。因此在英国利兹市有些超市把多于的食品便宜地卖给低收入的家庭,或者用多于的食物做成饭给穷人们。作者认为政府应制定法律来阻止食物浪费。 1.D 细节理解题。根据What’s more, around 800 million people in the world do not hav...

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