1.As is predicted by scientists,the global pollution has hecome one of the most severe problems that humans face with.

2. Competition for the job is tough ,because we have five times as many applicants this year as there were last year.

3.As the fact shows,education program should fit into the economic plane.

4.The car takes so much gas,moreover,the price is two times as much as I intend to pay.

5.To know a international event,we need to consider the history and? the political background about it, firstly.