单项选择题

Seldom any mistakes during my past five years of service in the company.

A．I did make
B．I would make
C．did I make
D．would I make
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单项选择题
It is important to our awareness about environmental protection.
A．improve
B．make
C．form
D．raise
单项选择题
the government agrees to give extra money, the theatre will have to be closed next month.
A．Unless
B．If
C．Since
D．As
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