问题
选择题
—David, is that man your Chinese teacher?
—It _______ be him. He's having a meeting. [ ]
A. mustn't
B. can't
C. needn't
D. won't
答案
答案：B
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—David, is that man your Chinese teacher?
—It _______ be him. He's having a meeting. [ ]
A. mustn't
B. can't
C. needn't
D. won't
答案：B
