---Listen! Is Tom singing in the room? -
问题:
---Listen! Is Tom singing in the room?
--- No, it ______ be Tom. He has gone to Paris.
A. mustn’t B. needn’t C. can’t
---Listen! Is Tom singing in the room?
--- No, it ______ be Tom. He has gone to Paris.
A. mustn’t B. needn’t C. can’t