单项选择题

A．Something is on fire.
B．The two speakers don’t smoke.
C．Smoking is forbidden there.
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单项选择题
A．Put some sugar in the water.B．Prevent roses from the sunshine.C．Put a little vinegar in the water.
A．Put some sugar in the water.
B．Prevent roses from the sunshine.
C．Put a little vinegar in the water.
单项选择题
A．About one hour.B．About half an hour.C．About one hour and a half.
A．About one hour.
B．About half an hour.
C．About one hour and a half.
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