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With more forests destroyed, huge quantities of good earth   each year.
A.is washing awayB.is being washed away
C.are washing awayD.are being washed away
答案:D
试题分析: 考查动词的时态和语态和主谓一致。句意:随着森林的被毁,大量的优质土壤每年都被冲走huge quantities of后面动词用复数,而且此处土壤是被冲走,还要有被动。are being washed away是进行时的被动语态,翻译成正在被,选D
考点 : 考查动词的时态和语态和主谓一致