练习册

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    [2010·江西师大附中第二次联考]You should understand the math problem now, you have had it three times. A. explaining B. to explain C. explained D. explain 49C考查非谓语动词的用法.此处考查have sth done的结构.此处过去分词explained作宾补. 【查看更多】

     

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