With more forests being destroyed, huge quantities of good earth _______ each year.
A．is washing awayB．is being washed away
C．a(chǎn)re washing awayD．a(chǎn)re being washed away
D
本題考查主謂一致與語態(tài)。quantities of作主語時謂語動詞用復(fù)數(shù)，而“a large quantity of + 不可數(shù)名詞”作主語，謂語動詞用單數(shù)，因此答案在C、D之間選。each與wash away之間為被動關(guān)系，因此D為正確答案。
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