1. with the remarkable improvement of people's living standard 随着人民生活水平的显著提高
2. In contemporary society, it is becoming increasingly common that people+直观的现象(通过从句表达),或for some people(可以细化具体的参与者)to do sth题目中的中心事件，which has aroused deep social concern.
1. A exert/have/bring about/exercises
influence/effect/impact on B.
2. A lays a solid foundation for B.
3. A plays a /significant/indispensable/decisive/fundamental/crucial/irreplaceable role in B.
A is of vital importance to B
1. The topic/ issue of whether S +V +O as/since/ in that it originates from/ comes from sth.
2. The problem of sth. is no longer restricted within sth. but more severe in the aspect of sth.
1. There are three reasons for this.
2. The reasons for this are as follows.
3. The reason for this is obvious.
4. The reason for this is not far to seek.（托福写作满分案例欣赏）
5. The reason for this is that...
1. From what has been discussed above,we may safely drawthe conclusion that......
2.In summary, it is wiser......
1. Only in this way can we have a better and brighter future.(此处必须用倒装句一定记住)
2. Just imagine how great the world would be if only we…
3. I believe a happy and bright future is awaiting us if we can …（向客服索要托福备考资料）