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13.Because of serious pollution,they have to have these machineswashed[w??t].

分析 完成句子根据所给音标写出单词首先理解句意"由于严重的污染,他们不得不请人清洗这些机器"结合句意及音标,写出正确的单词

解答 答案:washed 根据句意及音标可知用wash"清洗"这个单词,再根据音标[w??t].可知ed在清辅音后发/t/,以及have sth done"请某人做某事"需用动词的过去分词做宾语补足语.故用wash的过去分词washed,故填washed

点评 做完成句子题根据所给音标写出单词首先理解句意,结合句意及音标 写出正确的单词

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