综合写作:
阅读说 lower speed limit好处多多啊
1、可以减少serious accidents
2、可以减少尾气emission,提升air quality
3、可以减少fuel的使用
professor义无反顾地反驳它:
1、serious accidents的减少可能是其他因素引起的,如better road condition & car equipments
2、其实并没有改善环境呀,只有0.1%的减少,空气质量还是poor
3、浪费了drivers的时间,货物运输时间变长了,使得成本也高了。
独立写作作:the advice from our grandparents have no use for their grandchildren because the world changed a lot during the past 50 years.