单项选择题

My sister met him at the Grand Theatre yesterday afternoon, so he ______ your lecture.

A．couldn't have attended
B．needn't have attended
C．mustn't have attended
D．shouldn't have attended
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单项选择题
He spend the whole evening at home, ______ .
A．written a composition
B．write a composition
C．writing a composition
D．to write a composition
单项选择题
At last, about twent7 people ______ at the meeting.
A．turned on
B．turned up
C．turned off
D．turned out
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