单项选择题

If the students ______ the machines, they may hurt ______.

A．hold, them
B．touch, themselves
C．hit, their
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单项选择题
The lake is far away. But ______ people like to swim there.
A．a little
B．few
C．a few
单项选择题
The old man is ______ 50 and 55 years old.
A．between
B．about
C．during
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