2. 外语
  3. They must have been enjoying themselves there, or they______so long.

They must have been enjoying themselves there, or they______so long.

admin2016-03-04  43
问题 They must have been enjoying themselves there, or they______so long.
选项 A、can’t have stayed
B、wouldn’t have stayed
C、needn’t have stayed
D、couldn’t stay
答案B
解析 这是一个含蓄虚拟条件句。or相当于or else，otherwise“否则的话”，意思同if they hadn’t enjoyed themselves…，故应选B。
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