2021年秋季西南科技大学网络教育高起专英语入学测试模拟题及答案6

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47. During one summer not long ago, Americans in the Southwest were without rain for many days. The sun burned up crops. Animals went hungry on the dry land. At last, clouds appeared in the sky and sent down rain.

How do such clouds form? The sun, the earth, and the air all play a part. The changes that take place before clouds can form do not always happen quickly. First, the earth is heated by the sun. This causes tiny drops of water in oceans and rivers to rise and mix with air. As the wet air rises higher, it cools off, making clouds.

What causes these clouds to become rain? The tiny drops of water inside the clouds become larger as they gather more wetness from the air around them. Finally, the drops become so large that they can no longer be held up by the air. They fall to the ground as rain.

The raindrops that fall are not always the same size. Some may be very large. But the smallest come down in a fine mist.

Rain is needed for all life. When it falls after a long dry spell, trees, grass, and bushes may begin to look fresh and green again. These plants need water to stay healthy. The rain also causes streams to fill with water. This makes it possible for fish and other animals to live. Rain brings new life and hope to millions of people and other living things.

1)【单选题】The first paragraph mentions the period of time during which the weather was very ______ and crops were _______.

A.rainy, burnt B.drought, burnt up

C.drought, burnt D.dry, burnt up

答案：D

2)【单选题】The phrase “play a part” means _______.

A.be a role B.form as a part

C.connect with each other D.make a contribution

答案：D

3)【单选题】Concerning how rain comes into being, which statement is true?

A.A lot of drops of water rise and mix with air as the sun shines.

B.Wet air cools off as it rises higher.

C.The drops become larger and larger as they gather more wetness.

D.The drops fall to the ground as they become too large to hold up.

答案：D

4)【单选题】In the last paragraph, the word “spell” means ________.

A.weather B.a period

C.times D.none of the above

答案：B

5)【单选题】This passage mainly explains ________ of clouds and rain.

A.the formation B.the phenomena

C.the importance D.the function

答案：A

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