单项选择题

"It" in the first sentence of this passage refers to ______.

A．drought
B．moisture
C．evaporation
D．rain
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单项选择题
Which of the following is NOT a cause of drought
A．Unwise fanning practices.
B．Fast evaporation of moistures.
C．Water shortages.
D．Rising up of temperature.
单项选择题
The word suffocated ( sentence 4, para. 4) most probably means ______.
A．swept over
B．caused disaster to
C．made unable to breathe
D．blew away
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