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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The old lady has not yet ______ the death of her husband.
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B．get away with
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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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