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    28．------I don’t know why he has made such a silly mistake in the exam. ------ He it before he handed in the paper. A. may have checked B. might check C. must have checked D. should have checked 【查看更多】

     

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    ------I don’t know why he has made such a silly mistake in the exam.

       ------ He ____________ it before he handed in the paper.

    A. may have checked         B. might check

    C. must have checked       D. should have checked

     

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    ---I don’t know why he has made such a silly mistake in the exam.
    --- He ______ it before he handed in the paper.


    1. A.
      may have checked
    2. B.
      might check
    3. C.
      must have checked
    4. D.
      should have checked

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    ------I don’t know why he has made such a silly mistake in the exam.

       ------ He ____________ it before he handed in the paper.

    A. may have checked         B. might check

    C. must have checked       D. should have checked

    查看答案和解析>>

    ------I don’t know why he has made such a silly mistake in the exam.
    ------ He ____________ it before he handed in the paper.

    A．may have checkedB．might check
    C．must have checkedD．should have checked

    查看答案和解析>>


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