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    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】

    试题分析：考查quantity用法。 a quantity of /quantities of 不管后面接复数还是单数(包括不可数)名词，只看quantity 本身。即：a quantity of 中的quantity 是单数，谓语动词就用单数；quantities of 中quantities 是复数，谓语动词则与复数保持一致，另土地应是被冲走，应用被动，句意：因为许多森林被毁，每年大量好土地被冲走。故选D

    考点：考查quantity用法

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