题目内容

11．                 helps us a lot to protect the environment．（　　）
A．Buying old thingsB．Making cheap things
C．Recycling thingsD．Using cheap things

分析 回收东西对我们保护环境有很大帮助．

解答 答案：C．考查动名词短语．句意"回收东西对我们保护环境有很大帮助．"．A买旧东西．B制造便宜东西．C回收东西．D使用便宜东西．结合语境"____对我们保护环境有很大帮助．"，可知，应该是"回收东西"，选C．

点评 考查介词用法，这个知识点很广泛，有一些固定用法，需要日常积累，结合语境选择正确介词完成习题．

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