问题
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
B:must; can’t
C:must; mustn’t
D:may; mustn’t
正确答案是：
同类题型
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________many times, but he still couldn’t remember my phone number
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It was in the lab __________ my father did the experiment yesterday evening.