More than 30,000 drivers and front seat passengers are killed or seriously injured each year.At the speed of only 30 miles per hour it is the same as falling from a third-floor windows.Wearing a seat belt saves lives; it reduces your chance of death

More than 30,000 drivers and front seat passengers are killed or seriously injured each year.At the speed of only 30 miles per hour it is the same as falling from a third-floor windows.Wearing a seat belt saves lives; it reduces your chance of death
More than 30,000 drivers and front seat passengers are killed or seriously injured each year.At the speed of only 30 miles per hour it is the same as falling from a third-floor windows.Wearing a seat belt saves lives; it reduces your chance of death or serious injury by more than half.
Therefore drivers or front seat passengers over 14 in most vehicles must wear a seat belt.If you do not,you could be fined up to ￡50.it will not be up to the drivers to make sure you wear your belt.But it will be the driver’s responsibility to make sure that children under 14 do not ride in the front unless they are wearing a seat belt of some kind.
However,you do not have to wear a seat belt if you reversing your vehicle; or you are making a local delivery or collection using a special vehicle; or if you have a valid medical certificate which excuses you from wearing it.Make sure these circumstances apply to you before you decide not to wear you seat belt.Remember you may be taken to court for not doing so,and you may be fined if you cannot prove to the court that you have been excused from wearing it.
25.For some people,it may be better ________.
A) to wear a seat belt for health reasons
B) not to wear a seat belt for health reasons
C) to get valid medical certificate before wearing a seat belt
D) to pay a fine rather than wear a seat belt
为什么不是A呢

More than 30,000 drivers and front seat passengers are killed or seriously injured each year.At the speed of only 30 miles per hour it is the same as falling from a third-floor windows.Wearing a seat belt saves lives; it reduces your chance of death
or if you have a valid medical certificate which excuses you from wearing it——意思是说 “你可以不系安全带,如果你有有效的医学证明（来证明你的身体情况不能系安全带）”,也就是说有些人是由于身体原因不能系安全的.
安全带本身是为了保证人的生命安全,但是对某些人来说,安全带反而会对他们的身体健康造成危害.