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Our parents often tell us not alone in the river in summer．
A．swim B．to swim C．swimming
Our parents often tell us not ________ alone in the river in summer．
A．
swim
B．
to swim
C．
swimming
D．
swam
A．swim
B．to swim
C．swimming
(2007年长沙)
Our parents often tell us not ________ alone in the river in summer.
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