B
As we all know, water is important. Water helps us grow food, cook and stay clean. People can't live without water.
But the shortage of water is a big problem. Today, about 20% of people don't always have enough water. Scientists say by 2025, about 70% of people all over the world may not have enough water.
Some places are always very dry. There isn't a lot of rain. Other places have enough water. But people in these places are not always wise about saving water. They waste too much of it.
So we should help save water. We can save water at home. We can take a quick shower. We can turn off the tap while brushing our teeth. We can also reuse water as often as possible.
Let's work together and make a difference.
根据材料内容选择最佳选项。
()30. How does the writer raise water problems in Paragraph 2?
A. By asking questions.
B. By listing numbers.
C. By telling a story.
D. By showing an idea.
()31. What does the underlined word "shortage" in Paragraph 2 mean?
A. Not having enough of something.
B. Having many things.
C. Beautiful things.
D. Lots of rubbish.
()32. How many reasons for water problems are there in Paragraph 3?
A. One. B. Two.
C. Three. D. Four.
()33. What is Paragraph 4 mainly about?
A. Where water comes from.
B. Why there isn't enough water.
C. How to save water.
D. How to reuse water wisely.

30. B 由第二段中的20% 、70% 可
知，作者是通过列数字的方法
提出有关水的问题。
31. A 由后两句可知，现在世界上大
约有20%的人没有足够的水；
到2025年可能有70%的人没有
足够的水。由此判断，shortage
与A项意思一致。
32. B 由第三段可知，该段提到造成
水出现问题的原因有两个：天
气干旱以及人们的浪费。
33. C 由第四段可知，本段主要描述
如何节约用水。

C
It is in every living thing. It is in the air. It is under the ground. It runs through mountains and valleys. It forms lakes and oceans. What is it? It's water.
Nature has a great water system. Rain falls from the sky to the ground, and the water finds its way to streams and rivers. Rivers goes into the oceans. At the mouths of the rivers, fresh water joins the salt water of the ocean. When fresh water runs through different places, it brings rich nutrition for plants and animals to live on.
There are many kinds of important plants and animals at the mouth of a river. So we have to make our streams and rivers clean. We have to work with nature—not against it.
根据材料内容选择最佳选项。
()34. What's the main idea of Paragraph 1?
A. What water is.
B. How water forms.
C. Water is important.
D. Water is everywhere.
()35. What does the underlined word "it" refer to in Paragraph 2?
A. Fresh water. B. Salt water.
C. The ocean. D. The nature.
()36. Where does the water in streams and rivers come from?
A. Rain. B. Nature.
C. Valleys. D. Oceans.
()37. What can we learn from the text?
A. We can find water in everything.
B. We should learn to work with nature.
C. The mouth of a river is near the mountains.
D. There is no salt water at the mouths of the rivers.
()38. Where can we probably read the text?
A. In a poster about traveling.
B. In a book about sports.
C. In a science book.
D. In a history book.

34. D 由第一段可知，作者说的是
“水”，表明了它的“无处不在”。
35. A 由前半句可知，it指的是fresh
water。
36. A 由第二段第二句可知，小溪以
及河流中的水来自雨水。
37. B 由第三段最后一句可知，人类
应该学会和自然和谐共生，而
不是违反自然规律。
38. C 通读全文可知，本文是一篇关
于水的科普短文，故应该来自
自然科学方面的书籍。