单项选择题

By the time you finish your homework, all of us （） ours at hand, I'm sure.

A．will finish
B．will have finished
C．have finished
D．have been finishing

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单项选择题

Schools should teach our kids various subjects, and moreover teach them how to （） right from wrong.

A．run
B．take
C．tell
D．put

单项选择题

They went （） the schedule for the conference again and again until they felt satisfied with every detail of it.

A．out
B．up
C．over
D．by

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