单项选择题

The present situation in about half of the states is that the graduated licensing system ______

A．is under discussion
B．is about to be set up
C．has been put into effect
D．has been perfected
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单项选择题
According to Paragraph 3, which of the following statements is TRUE
A．Teenagers should spend more time learning to drive.
B．Driving is a skill too complicated for teenagers to learn.
C．Restrictions should be imposed on teenagers applying to take driving lessons.
D．The licensing authorities are partly responsible for teenagers' driving accidents.
单项选择题
According to Robert Foss, the high death rate of teenage drivers is mainly due to ______
A．their frequent driving at night
B．their improper way of driving
C．their lack of driving experience
D．their driving with passengers
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