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7.It is quite difficult to find who isresponsible(对…负责) for pollution.

分析 找到对污染负责的人很不容易.

解答 答案:responsible
对…负责:be responsible for…,常用短语.

点评 翻译题在解题是首先要确定好句子的时态,然后要把握好短语表达,最后要注意句子结构.

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