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
______, he is always modest.
A. With all his profound knowledge
B. Because of all his profound knowledge
C. With his all profound knowledge
D. For his profound knowledge
单项选择题
Nancy was surprised that they have ______. They seemed to be a happy couple.
A. split up
B. broken down
C. fallen through
D. knocked out
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