单项选择题

During the examination you are supposed to stay in your seats, to keep your eyes on your papers, ______ to anyone.

A．but could not talk
B．not talk
C．and not to speak
D．rather than
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单项选择题
______ you study hard, you are sure to past the exam.
A．As soon as
B．As long as
C．As well as
D．As much as
单项选择题
They are trying to work out a ______ to the problem.
A．satisfaction
B．solution
C．concentration
D．attention
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