答案：
解析：
　　The inventions of the cars and trucks have given us many advantages. For example Travelling in cars and buses can buses can save us a lot of time and it is quicker and more convenient. 　　However with the development of car industry the cars and trucks bring us more trouble. 　　First oil is burnt in cars trucks and buses. They produce waste gases which have polluted the air. 　　Next traffic accidents have become more and more. There are over 500 000 people die from traffic accidents and more than 12 000 000 people are injured every year in the world. 　　Therefore we must take measures to protect people's lives from being killed and stop the cars and trucks from sending waste gases into the air.

答案：
解析：
　　The inventions of the cars and trucks have given us many advantages. For example Travelling in cars and buses can buses can save us a lot of time and it is quicker and more convenient. 　　However with the development of car industry the cars and trucks bring us more trouble. 　　First oil is burnt in cars trucks and buses. They produce waste gases which have polluted the air. 　　Next traffic accidents have become more and more. There are over 500 000 people die from traffic accidents and more than 12 000 000 people are injured every year in the world. 　　Therefore we must take measures to protect people's lives from being killed and stop the cars and trucks from sending waste gases into the air.