一、阅读理解。
A
When it rains, water falls from clouds in the sky to the ground. But how does the water get into the sky?
There is always water in the air, but you can't always see it. Its name is water vapor (蒸汽). When it's sunny, the water in rivers, lakes, and oceans gets hot. The hot water turns into water vapor. It goes up into the sky.
High in the sky, it is warm at first. When water vapor gets cold, it turns into water again. You can see this when you have a glass of cold drink on a hot day. Water is on the outside of the glass. Water vapor in the air turns into water when it meets the cold glass.
Millions of water drops come together in the sky. ▲ Wind moves clouds. And the water vapor in clouds cools off (冷却) and changes to water. Then the water falls to the earth.
Rain falls back into oceans, lakes and rivers. The sun turns it into water vapor. Then the water cycle starts again.
根据材料内容选择最佳选项。
()1. How does the writer start the passage?
A. By telling a story.
B. By making a survey.
C. By asking a question.
D. By making an example (例子).
()2. What does the second paragraph mainly talk about?
A. How water gets into the sky.
B. How water becomes water vapor.
C. How water vapor becomes water.
D. How water falls to the earth.
()3. What does the underlined word "this" refer to (指代)?
A. The hot water turns into water vapor.
B. The water vapor goes up into the sky.
C. The water vapor turns into water.
D. The water vapor gets cold.
()4. Which sentence can be put in the ▲?
A. They fall on the ground.
B. They form clouds.
C. They change to water.
D. They cool off.
()5. Where can we find the passage?
A. In a history book.
B. In a science book.
C. In a math book.
D. In a biology book.

1. C 由第一段第二句可知，作者是通过提问开启本文的。
2. A 由第二段最后一句可知，第二段主要讲了水如何进入天空。
3. C 由第三段第二句可知，this指的是水蒸气变成水。
4. B 由第四段第三句可知，上一句一定提到了clouds。
5. B 本文主要讲了水循环的知识，应该来自科学读物。