[填空题]

How can people make use of sea water They make use of it by ______________________ the salt.

[填空题]How can people make use of sea water
They make use of it by （） the salt.

[填空题]Why people can’t use all of the fresh water
Because some of it is（）.

[简答题]S2. According to the author, how can effective use be made of modem manufacturing systems

[填空题]How can we make our country caring and just according to the passage

[单项选择]How time flies! You should make （　） use of your time.
A. best
B. the worst
C. good
D. the best

[填空题]How can we get the ability to use free time
We can （） the skill.

[填空题]People use it to travel across water.

[简答题]Some people in the city use as much water as they wish, and take it for granted.

[单项选择]How does water scarcity affect people First of all, it (31) their health. It is not that they will die of thirst; rather, the poor quality of the water (32) for cooking and drinking may make them ill.
(33) our bodies require water to treat waste products, plentiful water is required for proper sanitation (卫生)—water that for much of mankind is simply not available. (34) people without adequate sanitation rose from 2.6 billion in 1990 to 2.9 billion in 1999. And sanitation is literally a matter of life and death. In a (35) statement, United Nations officials warned:
"When children lack water that is fit for drinking and sanitation, virtually every aspect of their health and development is (36) ."
Food production is dependent on water. Many crops, of course, are watered by rain, but in recent times irrigation has become the key (37) the world% booming population. Today percent of the world’s harvest depends on irrigation.A. to feed
B. to feeding
C. for feed
D. for feeding