专四专八考试

【单选题】 The dean of our department is supposed ______ for Florence the day before yesterday.
A．to leave
B．to have left
C．to be leaving
D．to have been left

网考网参考答案：B
网考网解析：
[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] 查看试题解析出处>>