Asweallknow,recentaccidentsresultedfromschoolbuseshaverisennationalconcernaboutthesafetyofschoolbuses.

　　Asaprimarytransportationforschoolchildren,thefrequentaccidentsofschoolbusescanbetracedtoseveralreasons.Firstofall,schoolbudgetislimitedsothattheschoolcannotaffordsufficientbuses.Secondly,theregulationonoverloadingisnotperfect.Consequently,schoolbusesoftenaccommodatemorestudentsthantherequirednumber,whichwillbepotentiallydangerous.

　　Inordertoguaranteethesafetyofschoolbuses,schoolsandthesocietymustcooperatetoenhancethesecuritystandardandberesponsibleforthestudents.

　　104个词,可能有点少,再加点吧.第一段校车事故频发引关注；第二段分析原因；最后呼吁.

　　ps：这种题目可能不会考.自己理个思路就行了.