题目内容

【题目】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?

【答案】

【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’ cells have the ability to keep and repair their telomeres. This, they said, helps guard against the aging process可知是因为它们的细胞有保护和修复端粒的能力；故选B

【3】根据these mammals have been found to live nearly 10 times longer than that.可知活4年的10倍；故选A

【4】根据文章讲述了蚂蚁是个长寿的动物的事情。故选C

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One day, the broken bag thought, “I am just a broken bag with many holes, why does my owner take me along to bring seeds?” It then asked the villager, “Why don’t you throw me away? You know I am of no use. I drop all the seeds you put in me.”

The villager smiled, “I will tell you what you what good you have done to me and others, ” saying this, the villager took the broken bag outside and said,” Do you see all the trees? These trees are all along the way from this village to the next, from where I buy seeds. These trees have grown from the seeds you have been dropping along the way. ”

The villager continued, “These trees give cool shade to tired people on hot sunny days. They also give oxygen(氧气) to humans and animals. Can’t you see you’ve done the world a great service?”

The broken bag was happy to learn all this. It realized that everyone has something good to offer to the world!

【1】The villager took the bags to another village to ________.

A. buy seeds B. sell flowers C. plant trees D. pick fruits

【2】What did the broken bag think of itself at first?

A. Clever B. Special C. Useless D. Ugly

【3】How did the broken bag feel after it knew everything?

A. Happy B. Surprised C. Anxious D. Embarrassed

【4】What does the story mainly tell us?

A. It takes time for trees to grow.

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【题目】Tom worked hard in an office. But it seemed that there was little change in his life. He was unhappy and didn’t want to improve himself any more. His father, Joe, knew this and decided to have a talk with_________

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【1】A. you B. me C. her D. him

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From: amycali5000@aeim.cup

Subject: school project

Hi there!

How is it going? Haven’t heard from you for a long time.

We are dong a project at school about how different teenagers in the world have fun. I’d really like you to help me if you can! So, can you tell me:

·what things you do to have a good time?

·why you think having fun is important?

If you can think of anything else to write, please do! In return, I’ll send you some great pictures of me and my friends in California.

Thanks very much, and write soon!

Amy

From: amycali5000@aeim.cup

Subject: school project

Hi, Amy!

Thanks for your email. Sorry I haven’t written sooner. Anyway, you want to know how we have fun here.

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Li Lei

【题目】Gardening is popular in many parts of the world. It brings us sweet smelling flowers, fresh fruit and vegetables. But you can get more from your garden.

Gardening helps to keep healthy. Today’s people sit indoors for too long and don’t get much exercise . When you garden,you have to move around . It’s a good chance for you to exercise your body by watering flowers or doing some digging.Besides, when you are in your garden, you can feel the warm sunshine. This means you are getting Vitamin D．It help your bodies use calcium (钙),which necessary to keep your bones(骨骼) strong.

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Gardening is a great way to meet people and build relationships. When you are gardening, you are outdoors. So it is a perfect time to communicate with your neighbors. Most people love to talk about their hobbies, and so do gardeners. They usually enjoy showing people what they are growing. And most enjoy sharing advice and stories about their gardens.

【1】When it’s , you can get Vitamin D in your garden.

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【2】According to the passage, is one of the gardening activities.

A. watching TV B. watering flowers

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【3】Which of the following can be the missing part in Paragraph 3?

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C. Gardening is a great activity to do with children.

D. Gardening can be a good way to meet neighbors.

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【题目】Have you ever heard of Stonehenge( 巨石阵 )? These ancient huge stones have been standing on the Salisbury Plains(索尔兹伯平原 ) in England for thousands of years. Who build Stonehenge? Some people said that the ancient Greeks built it. Some people said that it was a site where UFO landed. It’s still a mystery.

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【2】Which of the following statement is true?

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【3】A. helps B. takes C. tells

【4】A. way B. time C. feeling

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