单项选择题

The American Association Foundation for Traffic Safety plans to

A．try out the Japanese method in certain areas
B．change the road signs across the country
C．replace straight, horizontal bars with chevrons
D．repeat the Japanese road patterns

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单项选择题

Which of the following best describes the anther’s tone in this passage

A．Optimistic.
B．Critical.
C．Objective.
D．Arbitrary.

单项选择题

What does the author say about straight, horizontal bars painted across roads

A．They are failing out of use in the United States.
B．They tend to be ignored by drivers in a short period of time.
C．They are applicable only on broad roads.
D．They cannot be applied successfully to traffic circles.