练习册

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    You should understand the math problem now, you have had it three times. A. explaining B. to explain C. explained D. explain 【查看更多】

     

    题目列表(包括答案和解析)

    You should understand the math problem now, you have had it ______ three times.
    [     ]
    A. explaining
    B. to explain
    C. explained
    D. explain

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