单项选择题

The growing size of the population is ______ major concern of ______ society nowadays.

A．/... the
B．a... /
C．a... the
D．the... the
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单项选择题
What you have said cannot be ______ to my small firm.
A．supplied
B．used
C．applied
D．practiced
单项选择题
______ they can change their sales strategies, tile future for their company will be indeed bleak.
A．Even if
B．Now that
C．As long as
D．Unless
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