问题

―Is Tom coming to the concert this evening―No, he _________ be at the concert. He _______ abroad.
A:mustn’t, has been
B:mustn’t, has been to
C:can’t, has gone to
D:can’t, has gone;
B:mustn’t, has been to
C:can’t, has gone to
D:can’t, has gone;
正确答案是:
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