单项选择题

If you ______ that night, you might have been too late to get your ticket.

A．didn't hurry
B．hadn't hurried
C．wouldn't hurry
D．hadn't to hurry
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单项选择题
The rough draft of any research report should be edited to ______ that all data are correctly presented, that all equipments are listed, that all results are properly de-tailed.
A．ensure
B．assure
C．secure
D．insure
单项选择题
Your experiment reports must be checked with care before ______.
A．handed them in
B．them handing in
C．being handed in
D．handing them in
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