题目内容
The world is not only hungry,but also thirsty.This may s 1 strange to you,since nearly 70% of the earth's surface is covered w 2 water. But about 97% of that is sea water,or salt water. Humans can only drink and u 3 the other 3%一the fresh water from rivers,lakes,the underground and o 4 sources. And we cannot even use all of that. Even worse,some of it has been polluted.
However as things stand today? this fresh water is still e 5 for us. But our need for water is b 6 larger and larger —almost day by day. We should take s 7 to do with this problem now and in this w 8 we can get away from a serious water shortage (^fc^) later on.
We all have to learn how to s 9 wasting our valuable water. One of the first steps is to develop ways of reusing it. Today in most large cities,water is used only once and then sent into a sewer system (排污系统). From there it r 10 to the sea or runs into underground places.
1. 2. 3. 4. 5.
6. 7. 8. 9. 10.
五、 1. seem 2. with 3. use 4. other
5. enough 6. becoming 7. steps 8. way
9. stop 10. returns
