填空题

Paragraph 2 ______.

【参考答案】

E
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单项选择题
According to the passage, we can avoid a worldwide water shortage in the future by
A．increasing rainfall.
B．reusing water and utilizing sea-water.
C．cutting down our consumption of water.
D．reducing the number of factories producing steel.
单项选择题
What percentage of the earth's water can man actually use at present
A．Nearly 75 per cent.
B．About 97 per cent.
C．Exactly 3 percent.
D．Less than 3 per cent.
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