单项选择题

What is Sam suffering from

A．Cold.
B．Lung.
C．Cough.
D．Congestion.
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单项选择题
What has happened to Sam
A．He has been run over by a train.
B．He is trying to run over to a train.
C．He has been running along by a train.
D．He feels like being run over by a train.
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