单项选择题

The task will be finished ____________ if everything goes on as we have planned.

A．ahead of schedule
B．on schedule
C．behind schedule
D．in schedule
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单项选择题
A driver should concentrate ____________ the road when driving.
A．from
B．in
C．on
D．of
单项选择题
You haven't done the job ____________ —you'll have to do it again.
A．comprehensively
B．properly
C．consequently
D．regularly
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