单项选择题

You'd better ______ it again．

A． not do
B． not did
C． did not
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单项选择题
Can I have the key ______ the front door，please
A． to
B． with
C． upon
单项选择题
The thief ran away ______ .
A． as quick as he could
B． as quickly as he could
C． as quickly as it could
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