单项选择题

You ______ smoke while you"re walking around in the wood. You ______ start a fire.

A．might not; can
B．mustn"t; shall
C．mustn"t; could
D．might not; should
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单项选择题
China is the birth of kites, ______ kite flying spread to Japan, Korea, Thailand and India.
A．from which
B．where
C．from where
D．that
单项选择题
At the foot of the hill, you could hear nothing but the ______ of the running water.
A．noise
B．sound
C．voice
D．roar
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