单项选择题

These programs will help keep your home safe ______ fire.

A．from
B．with
C．about
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单项选择题
Last year Mr. Johnson sold his house at a good ______.
A．pay
B．price
C．money
单项选择题
Jason watched his two brothers ______ outside in the garden.
A．playing
B．to play
C．played
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