一、根据中文意思完成句子。
1. 河流和湖泊为人们提供淡水和鱼类。
Rivers and lakes people
fresh water and fish.
2. 我们不能让垃圾进入干净的河流和湖泊。
We can't let rubbish
clean rivers and lakes.
3. 清澈的河流看上去就像白色的丝带。
Clean rivers white
ribbons.
4. 学生们应该养成节约用水的习惯。
Students should
saving water.
5. 总之，我们需要把河里的垃圾清理掉。
In short, we need to
the rubbish in the rivers.

一、1. provide; with 2. get/go into
3. look like 4. develop a/the habit of
5. clean up

二、阅读短文，完成表格。
Water is very important to us. We can't
live with no water.
There is a lot of water on the earth, but we
can't use most of it. About 97% of the earth's
water is salty. Most of the fresh water
is snow and ice near the North Pole
and the South Pole. We can use only
about 1% of the water on the earth.
Sometimes the earth's water is in the wrong
place. There is a lot of rain in the tropics, but it is difficult to have farms in the
tropics. Most of the land there is not very rich.
And there is only a little water in the desert.
Main ideas of each paragraph Details of each paragraph
Para 1: Water is very 1. to us. · We can't live with no water.
Para 2: There is a lot of water on the earth,
but we 2. use most of it. · Most of the earth's water is salty.
·Most of the fresh water is 3. and ice.
· We can use very little water on the earth.
Para 3: Sometimes the earth's water is in the
wrong 4. . · Too 5. water in the tropics.
· Too little water in the desert.

二、1. important 2. can't 3. snow
4. place 5. much