单项选择题

There Was a knock at the door. It was the second time someone ______ me that evening.

A. had interrupted
B. would have interrupted
C. to have interrupted
D. to interrupt
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How much interest per year does the bank currently pay
A．2.5 percent.
B．4 percent.
C．7 percent.
D．It’s hard to say.
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What service must be paid for
A．Computer classes.
B．Training sessions.
C．Laser printing.
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