单项选择题

He said that he ______ since five o’lock.

A. has been working
B. was working
C. had been working
D. could have been working
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I only called the police when I ______ everything else.
A. tried
B. was trying
C. had tried
D. had been trying
单项选择题
Will you please lend me the novel when you ______ it
A. will finish
B. have finished
C. will have finished
D. finishing
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