A．reduces road accidents to more than a 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
A．make the front seat passengers 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
A．Someone who is backing into a parking space．
B．Someone who is picking up the children from the local sch001．
C．Someone who is delivering invitation letters．
D．Someone who is under l4．
A．to wear a seat belt for health reasons
B．not to wear a seat belt for health reasons
C．to get a valid medical certificate before wearing a seat belt
D．to pay a fine rather than wear a seat belt