A．We can invent ways of increasing rainfall.B．We can develop ways of reusing water and
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A．We can invent ways of increasing rainfall.
B．We can develop ways of reusing water and utilizing sea water,
C．We can cut down our consumption of water.
D．We can reduce the number of factories producing steel.
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正确答案：B
解析：综合推断题。由文章第二段提到的One useful step we should take is to develop ways of reusing it和文章最后讲的利用梅水资源可知，B正确。