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—Is Jessica giving us a speech this evening? —No, it _________ be her．She _________ to Japan． A. mus...
题目内容：
—Is Jessica giving us a speech this evening?
—No, it _________ be her．She _________ to Japan．
A. mustn’t；has gone B. mustn’t; has been
C. can’t; has gone D. can’t; has been
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