单项选择题

From the story at the beginning of the passage we know it is dangerous for a driver（）

A．to see red traffic lights
B．not to notice the traffic lights
C．to be color blind
D．not to see the red traffic lights

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单项选择题

A．raised
B．risen
C．placed
D．laid

填空题

A．large B．orange C．singer D．vegetable