单项选择题

I didn't see her in the meeting room this morning, she ______ at the meeting.

A．mustn't have spoken
B．shouldn't have spoken
C．needn't have spoken
D．couldn't have spoken
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单项选择题
A fire ______ last night in his house and the fireman came and
A．broke out ... put down
B．broke in ... put out it
C．broke out ... put it out
D．broke through... put it down
单项选择题
He used to ______ his teaching when he was young.
A．devote to
B．be devoted to
C．devoting to
D．being devoted to
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