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【题目】Three million tons of coal ______ every year in the city.

A.is exploited B.are exploited

C.had exploited D.have exploited

【答案】B

【解析】句意:这个城市每年要用三百万吨煤。主语中心语是tons,Three million和of coal都是修饰tons的,故谓语动词用复数,煤是被用,表示被动,故选B项。

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