问题
选择题
— Is Jack on duty today?
— It ____ be him; it's his turn tomorrow. [ ]
A. mustn't
B. won't
C. can't
D. needn't
答案
答案：C
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— Is Jack on duty today?
— It ____ be him; it's his turn tomorrow. [ ]
A. mustn't
B. won't
C. can't
D. needn't
答案：C