单项选择题

Most of the students failed in the final exam. It ______ easy.

A．can't be
B．shouldn't be
C．mustn't have been
D．couldn't have been
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单项选择题
In the eighteenth century, Writers ______ hours in coffee houses, discussing the news of the day.
A．used to spending
B．would be spending
C．used to spend
D．were used to spend
单项选择题
Hardly ______ when the accident happened.
A．he had gone
B．had he gone
C．he went
D．he has gone
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