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    【题目】 People planted trees on the waste hills_________ water and soil loss.

    A. to decrease B. decreasing

    C. decreased D. decrease

    【答案】A

    【解析】试题分析：句意：人们在荒山上种植了树木，目的是减少水土流失。考查不定式做目的状语，动词-ing形式表主动和进行，通常做时间状语或伴随状况，动词-ed形式表被动和完成，由句意可知，选A。

    考点: 考查非谓语动词的用法。

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