What makes driving a family car safer？Maybe it’s as simple as knowing that it’s the family’s car.I remember my horror when I backed into a car in the high school parking lot and crumpled the fender of the family car.I’m sure the realization that it wasn’t “my” car made me more sorry—and more careful.

　　Many parents are excited when their teenager is finally driving，and many teens need to drive themselves to school or work.As a result，it’s easy for parents to think that a new driver needs a car.Indeed，the researchers found that 70 percent of the teenagers said that they had their own car.This is dangerous，and parents should consider delaying giving a child a car at least until the teenager has been driving for a year.

　　Children who have strict parents were 50 percent less likely to have had a crash in the past year，compared with parents whose style is permissive.The advice：Don’t be afraid to set rules for safe driving behavior，and take the keys if those rules aren’t followed.In fact，making your teenager say，“Mom，can I have the car keys？”may be one of the simplest and best ways to keep your child safe.

　　【解题导语】 随着世界汽车保有量的增多，使得驾驶的初始年龄开始下降，由此造成的青少年驾驶事故愈来愈多。如何才能确保孩子的驾驶安全避免青少年驾车时发生车祸呢？

　　52．The percentage of teenagers who speed while driving a family car is________.

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