2. 专升本
  3. Their team must have won first prize in the competition yesterday,________?

Their team must have won first prize in the competition yesterday,________?

admin2021-06-28  14
问题 Their team must have won first prize in the competition yesterday,________?
选项 A、mustn’t they
B、haven’t they
C、didn’t they
D、have they
答案C
解析 当陈述句部分含有情态动词must，且must表示“想必，一定”等推测意义时，反意疑问句部分应根据陈述句部分的时态采用相应的动词或助动词形式。根据句中的yesterday可知，反意疑问句部分应用didn’t they。故选C。
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