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    精英家教网 > 高中英语 > 题目详情

    ---________ it be Li Ping who broke the glass?

    ---No．It ________ be Wu Dong who did it．


    1. A.
      Can; must
    2. B.
      Must; can
    3. C.
      Must; must
    4. D.
      May; need
    A
    表示对现在情况的肯定推测应用must，在疑问句和否定句中则用can和can’t。本题是一般疑问句，故用can。答句中已对李平打破玻璃作了否定说明之后，进一步用肯定的口气说明肯定是吴东做了此事，所以用must。
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