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.

　　21. This text is taken from ________.
　　A) a medical magazine
　　B) a police report
　　C) a legal document
　　D) a government information booklet（D）

　　22. Wearing a seat belt in a vehicle ________.
　　A) reduces road accidents by more than half
　　B) saves lives while driving at a speed up to 30 miles per hour
　　C) reduces the death rate in traffic accidents
　　D) saves more than 15,000 lives each year（C）

　　23. It is the driver’s responsibility to ________.
　　A) make the front seat passenger wear a seat belt
　　B) make the front seat children under 14 wear a seat belt
　　C) stop children riding in the front seat
　　D) wear a seat belt each time he drives（B）

　　24. According to the text, which of the following people riding in the front dos not have to wear a seat belt?
　　A) Someone who is backing into a parking space.
　　B) Someone who is picking up the children from the local school.
　　C) Someone who is delivering invitation letters.
　　D) Someone who is under 14.（A）

　　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（B）