单项选择题

Nearly half of all college students ______ while they are in school.

A．are free
B．are busy
C．have part-time (兼职的) jobs
D．have full time jobs
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单项选择题
The parents of children who attend private schools ______ for their children's education.
A．have to pay
B．have to make preparations
C．don' t have to pay
D．don' t have to make preparation
单项选择题
What is the cause of the problem that people living on parts of the south coast of England face
A．The disappearance of hotels, houses and gardens.
B．The experts' lack of knowledge.
C．The rising of the sea level.
D．The washing-away of limestone cliffs.
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