1.As the scientists predicted，the global pollution has gradually become one of the most serious problems that the mankind confronted .

2.The competition for these positions is fairyly fierce，and the number of this year's applicants is five times as many as last year's.

3.As the facts indicate，the educational program should fit into the national plan for economic development.

4.This car burns too much gas ，moreover the cost is twice as much as what I plan to pay.

5.In order to learn about a significant international event，we should initially consider its historical and political background.