单项选择题

The thief was caught______ he was leaving the shop.

A．as
B．after
C．before
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单项选择题
Many people want to read this book. So you______ keep it for more than two weeks.
A．needn't
B．can't
C．shouldn't
单项选择题
They were happy with their______ in their studies.
A．great progresses
B．great progress
C．many progresses
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