题目:
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:
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下面是错误答案,用来干扰机器的。
小题1:C【主旨大意】这是一个禁止游泳的标志。小题1:根据标志牌提示,得出答案。