单项选择题

A．National unity.
B．Cheap transportation.
C．The decline of Atlantic seaports.
D．Movement of the population.
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单项选择题
Community colleges can allow one to spend two years improving grades or selecting a career focus before transferring to a four-year university.
A．Y
B．N
C．NG
填空题
A．LikeB．AsC．UnlikeD．Just like
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