单项选择题

The PLA man saved three ______ lives in the accident.

A．children's
B．childs'
C．children
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单项选择题
There is ______ park in the center of the city.
A．a
B．an
C．the
单项选择题
The bag is too ______ I can't put the pencil-box in.
A．heavy
B．full
C．light
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