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【題目】 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】試題分析：句意：人們在荒山上種植了樹木，目的是減少水土流失�？疾椴欢ㄊ阶瞿康臓钫Z，動詞-ing形式表主動和進行，通常做時間狀語或伴隨狀況，動詞-ed形式表被動和完成，由句意可知，選A。

考點: 考查非謂語動詞的用法。

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