单项选择题

He ______ his textbooks when he left school and never reopened them.

A．put back
B．put aside
C．put down
D．put off
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单项选择题
Not only cars but also new-type trucks ______ with air conditioning.
A．equip
B．equipped
C．are equipped
D．was equipped
单项选择题
With such a short time ______ it doesn't seem likely that we will finish the job.
A．leave
B．leaving
C．leaves
D．left
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