单项选择题

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
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单项选择题
The concerto was performed by a violinist of unquestioned ______ but limited imagination.
A．capacity
B．faculty
C．competence
D．aptitude
单项选择题
By the end of next month we ______ the review on the research findings.
A．will finish
B．will be finishing
C．will have finished
D．have finished
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