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
（）different opinions as where the word Okay came from are mentioned in the text.

A．Four
B．Five
C．six
D．Three
单项选择题
Most American people（） so fast-food restaurants have become popular.

A．hate to dine with their family
B．like fast food’very much
C．don’t have enough time to eat dinner together with their family
D．live on fast food
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