单项选择题

We are wasting precious time sitting around here.

A．valuable
B．leisure
C．spare
D．previous
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单项选择题
He did his best to inspire his team to great efforts.
A．persuade
B．instruct
C．encourage
D．discourage
单项选择题
This book embraces many subjects.
A．adopts
B．covers
C．presses
D．accepts
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