单项选择题

The government cannot operate effectively________ it is free from such interference.

A．so long as
B．so that
C．unless
D．because
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单项选择题
“You are too self-centered. It’s high time you ___________that you are not the most important person in the world, ” Edgar said to his boss angrily.
A．realized
B．have realized
C．realize
D．should realize
单项选择题
Could you find someone___________
A．for me to play tennis with
B．play tennis with
C．for me to play tennis
D．play tennis
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