2. 外语
  3. -- My model plane has disappeared, mum. I Who ______ have taken it?

-- My model plane has disappeared, mum. I Who ______ have taken it?

admin2009-03-15  40
问题 -- My model plane has disappeared, mum.        I Who ______ have taken it?
选项 A、should
B、must
C、could
D、might
答案C
解析 在肯定句中表猜测用may，might和must，在否定句和疑问句中表猜测用can或 could。此处could have done表示对已经发生的情况的推测。
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