With many forests being destroyed, huge quantities of good earth ______ each year.

A. is washing away B. is being washed away

C. are washing away D. are being washed away

D

【解析】

試題分析：考查quantity用法。 a quantity of /quantities of 不管后面接復(fù)數(shù)還是單數(shù)(包括不可數(shù))名詞，只看quantity 本身。即：a quantity of 中的quantity 是單數(shù)，謂語(yǔ)動(dòng)詞就用單數(shù)；quantities of 中quantities 是復(fù)數(shù)，謂語(yǔ)動(dòng)詞則與復(fù)數(shù)保持一致，另土地應(yīng)是被沖走，應(yīng)用被動(dòng)，句意：因?yàn)樵S多森林被毀，每年大量好土地被沖走。故選D

考點(diǎn)：考查quantity用法

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