Every day 25 million U.S. children ride school buses. The safety record for these buses is much better than for passenger cars; but nevertheless, about 10 children are killed each year riding on large school buses, and nearly four times that number are killed outside buses in the loading zones. By and large, however, the nation’s school children are transported to and from school safety. Even though the number of school bus accidents is not large, the safety of children is always of intense public concern. While everyone wants to see children transported safely, people are divided about what needs to be done-particularly whether seat belts should be compulsory. People in favour of seat belts on school buses-many of them parents and medical organizations-argue that seat belts are necessary not only to reduce fatality and injury, but also to teach children lessons about the importance of using them routinely in any moving vehicle. A side benefit, they point out, is that seat belts help keep children in their seats, away from the bus driver. People who object to seat belt installation suggest that children are already well protected by the school buses that follow the Nation Highway Traffic Safety Administration’s (NHTSA) safety requirements set in 1977. They also believe that many children won’t wear seat belts anyway, and that may damage the belts or use them as weapons to hurt other children. A new Research council report on school bus safety suggest that there are alternate safety devices and procedures that may be more effective and less expensive. For example, the study committee suggested that raising seat backs four inches may have the same safety effectiveness as seat belts. The report sponsored by the Department of transportation at the request of Congress, re views seat belts extensively while taking a broader look at safety in and around school buses. 1.According to the passage, the “school bus” is . A.the bus offered by the school and different from the public bus B.the bus that has no difference from the public bus C.the bus that is driven by the students D.the bus that is not safe 2.According to the passage, who has the greatest degree of control of the school buses “safety”? A.A new Research Council.           B.The Department of Transportation. C.The Medical Organization.         D.National Highway Traffic Safety Administration. 3.It may be inferred from this passage that .       . A.many of the opponents(反对者) of seat belt installation are parents and officials of the Department of Transportation B.proposals of seat belts on school buses would be seriously considered C.an alternate safety device (raising seat backs four inches) may be taken into consideration D.The Department of Transportation may either take the idea of seat belts or other measures when it reviews the whole situation 4.The title below which best expresses the idea of the passage is“”. A.Making School Buses Even Safer for Children     B.Seat Belts Needed on School Buses C.Alternate Safety Devices and Procedures         D.Safety in and around School Buses