2.Driving on the highway,I realized that China's Bus system has changed a lot in recent years.
3.I even can not belive that they mastered computer operating so quickly.
4.It has been 3 years since I started my life in a foreign country,this moment come at last now:I will be back to my motherland in less than 2 weeks.
5.最后一好象说的有点问题,而表示转折的意思,是不是应该改成许多我认识的人都迫不及待地想回国,而我更是想和家人一起呆在国内（Many of my acquaintances are looking forward to be back home.More eager am I .I'm desiring to go back to stay with my family）
或者：许多我认识的人都不着急回国,而我却宁愿和家人一起呆在国内.（Many of my acquaintances do not hurry to be back,but I'd prefer to be back home to stay with my family）
或者可以这样说：Many of my acquaintances who went abroad are looking forward to be back now,but when given a choise,I'd prefer to be home to stay with my family instead of going abroad.