2. 外语
  3. The dean of our department is supposed ______ for Florence the day before yesterday.

The dean of our department is supposed ______ for Florence the day before yesterday.

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问题 The dean of our department is supposed ______ for Florence the day before yesterday.
选项 A、to leave
B、to have left
C、to be leaving
D、to have been left
答案B
解析 虚拟语气题。be supposed to have done是一种特殊的虚拟语气，相当于should have done，表示过去本应该做某件事而没有做。因此正确答案为B 。
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