题目内容
— It _______ be Jack who is in the office.
— No, it _______ be him. I saw him off at the airport half an hour ago.
- A.can’t ; can’t
- B.must; can’t
- C.must; mustn’t
- D.may; mustn’t
must表推测只用于肯定句;在否定句和疑问句中用can。
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题目内容
— It _______ be Jack who is in the office.
— No, it _______ be him. I saw him off at the airport half an hour ago.
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