单项选择题

You can't be ______ careful in making the decision as it was such a critical case.

A．very
B．quite
C．too
D．so
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单项选择题
The manager needs an assistant who he can ______ to take care of problems in his absence.
A．count on
B．count in
C．count up
D．count out
单项选择题
Problems common to most countries include the social, economic ______ problems.
A．and politics
B．and with government
C．of government
D．and political
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