问题
选择题
Tony ________ be in the classroom. I saw him in the library just now. [ ]
A. can't
B. mustn't
C. needn't
D. won't
答案
答案：A
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Tony ________ be in the classroom. I saw him in the library just now. [ ]
A. can't
B. mustn't
C. needn't
D. won't
答案：A