最近小车安全事故频发，校车安全问题越来越得到政府的重视。请你根据以下内容要点写一篇英语短文：
1、校车安全事故频发的原因：
1）校车质量堪忧；
2）某些司机素质不高；
3）超载、超速现象时有发生。
2、你的建议。（至少两点）
注意：1、词数：120左右；
2、可适当增加细节，以使行文连贯；
3、参考词汇：超载 overload ; 共同的 joint
One possible version:
The number of school bus accidents has been increasing in recent years. Why do such tragedies happen frequently？ The reasons are as follows.
First of all, some schools use unsafe buses because they can’t afford quality ones. Secondly, some drivers are not fit to drive school bus , but they do. Worse still, overloading and speeding , which easily lead to accidents, are very common.
To reduce school bus accidents, the government should take effective measures to manage school buses. As for students, I think it’s necessary to receive school bus safety education. All in all, only when the whole society makes a joint effort can we reduce school bus accidents greatly.
本题是写一篇给定材料的书面表达，写作的话题是有关校车安全的问题，具体内容包括，近些年校车的事故，校车事故的原因，校车质量堪忧，某些司机素质不高，超载、超速现象时有发生；同时写上个人对于校车安全所提供的建议，在写作时应注意符合题意，同时应注意语言的准确性和连贯性。