题目内容
He _______ in his office. I phoned to his office just now, but no one answered.
A. may be B. can’t be C. mustn’t be D. needn’t be
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题目内容
He _______ in his office. I phoned to his office just now, but no one answered.
A. may be B. can’t be C. mustn’t be D. needn’t be