单项选择题

The trouble is the boss is not______ of what his employees think of him.

A．confident
B．conscious
C．typical
D．tired
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单项选择题
Mr. Smith is supposed to______ for London the week before last.
A．to be leaving
B．to have been leaving
C．to have left
D．to have been left
单项选择题
The parents went from house to house,______ whether anyone had seen the lost boy.
A．demanding
B．inquiring
C．requiring
D．searching
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