单项选择题

There is a need for radical changes in education.

A．revolutionary
B．long-term
C．short-term
D．systematic
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单项选择题
Don’t tempt thieves by leaving valuables clearly visible.
A．alarm
B．catch
C．spot
D．attract
单项选择题
We need to identify the potential problems.
A．possible
B．main
C．immediate
D．common
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