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With more forests being destroyed, huge quantities of good earth _______ each year.
A.is washing awayB.is being washed away
C.are washing awayD.are being washed away
D
本题考查主谓一致与语态。quantities of作主语时谓语动词用复数,而“a large quantity of + 不可数名词”作主语,谓语动词用单数,因此答案在C、D之间选。each与wash away之间为被动关系,因此D为正确答案。
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