组合练 07

（阅读理解+完型填空+书面表达）组合练 07

一、阅读理解

On a summer day, a man sitting under a tree on the bank of a river, watched a group of ducks on the river.

Soon a branch with leaves came drifting among them, and they all flew away. After circling in the air for a little time, they landed again on their feeding ground.

Soon another branch came drifting down among them, and again they took flight from the river. But when they found the branch drifted by without any danger, they flew down to the water as before.

After four or five branches had drifted by in this way, the ducks gave little attention to them. At last, they hardly tried to fly out of their way, even when the branches nearly touched them.

The man who was watching all this, now wanted to know who drifted these branches. He looked up the river, and noticed a fox slyly watching the ducks. “What will he do next?” thought the man.

When the fox saw that the ducks were no longer afraid of the branches, he took a much larger branch, and hid himself behind it. Then he drifted himself with the larger branch. When he was right among the ducks, he caught two young ducks quickly and swam off with them. The rest of the ducks flew away in fright, and did not come back for a long time.

The fox must have enjoyed a fine dinner for what he had done.

1. What did the man watch on the river at first?

A. Ducks. B. Foxes. C. Leaves. D. Branches.

2. What did the ducks do as soon as the first branch came near them?

A. They fed themselves. B. They stayed still.

C. They looked for food. D. They flew away.

3. At last, even when the branches nearly touched the ducks, they _______.

A. tried to fly at once B. swam off quickly

C. were no longer afraid D. came back for a long time

4. Why did the fox drift the larger branch?

A. To have fun. B. To catch the ducks.

C. To cross the river. D. To swim with the ducks.

5. What do you think of the fox?

A. Clever and patient. B. Kind and thankful.

C. Interesting and outgoing. D. Lovely and friendly.

2

As the novel corona-virus（新型冠状病毒）spreads throughout China and the rest of the world, an important question has yet to be answered：where did the virus come from?

The latest study showed that pangolins（穿山甲）may be an intermediate（中间的）host of virus, according to Xinhua. However, some people thought bats may be the original（起初的）cause.

“We don’t know the source（来源）yet, but it’s possible that this is a bat origin corona-virus, said Peter Dazsak, president of Eco-Health Alliance, an environmental nonprofit（非营利机构）”, according to The New York Times, “When you look at the genetic sequence（基因序列）of the virus, and you match it up with every known corona-virus, the closest ones are from bats.” Dazsak also told CNN.

So why are bats the source of so many deadly kinds of viruses and why don’t they suffer from any symptoms（症状）? Bats can live long and live with millions of other bats in caves, where they can spread the virus far and wide. As the only flying mammal, their body temperature is high, similar to a fever. This fact may lead to bats’ special immune system（免疫系统）in protecting them from the ill effects of viruses.

It’s surprising to notice that the virus outbreak was traced（追溯）to the Huanan Seafood Market in Wuhan. People could buy no bats in the market. How could this be? “It seems that another animal host is acting as an intermediate host between bats and humans,” said Wu Guizhen, of the Chinese Center for Disease Control and Prevention, according to Live Science.

But are bats truly to blame（责怪）for the virus or should we be blaming ourselves? It’s the fault（错误）of humans for decreasing（减少）the distance between us and virus-carrying bats. Bats are an important animal in our ecosystem（生态系统）when it comes to pollinating（授粉）many fruits such as mangoes, bananas and avocados. We need to allow them to continue pollination and keep them away from our markets and mouths.

6. What can we learn about the origin of the novel corona-virus?

A. The virus was found to be genetically similar to those see in bats.

B. Pangolins are now considered the most likely source.

C. It’s confirmed by comparing sources of several different viruses.

D. Bats have been discovered to be its original cause.

7. Why don’t bats suffer from the corona-virus?

A. Their low body temperature protects them. B. Bats have a special immune system.

C. Bats are the only flying mammal to live in groups. D. Living in caves helps bats fight against viruses.

8. Which of the following is not true?

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