单项选择题

Boys, you ______ play on the road. It is dangerous.

A． musn't
B． can
C． needn't
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单项选择题
We must start right away, ______ we will miss the plane.
A． because
B． but
C． or
单项选择题
It's about 7 kilometres ______ from the bridge.
A． away
B． along
C． long
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