问题
选择题
Tony _____ go to the opera on Saturday because he's going to have a meeting. [ ]
A. can't
B. might
C. mustn't
D. should
答案
答案：A
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Tony _____ go to the opera on Saturday because he's going to have a meeting. [ ]
A. can't
B. might
C. mustn't
D. should
答案：A