题目内容
6.The new machine,if _________ properly,will work at least ten years.( )A. | use | B. | using | C. | being used | D. | used |
分析 这个新机器如果使用适当,可以工作至少十年.
解答 答案:D.从句主语the new machine与动词use之间为被动关系,故使用过去分词used,完整形式应为If it is used properly,故选D.
点评 本题考查过去分词的用法.应根据主语和动词之间的关系来选择合适的过去分词.
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