1.As scientists foresee,the global pollution has become one of the most serious  problems that human beings is facing with.

2.The competition for these positions is so fierce that the amount of applicants this year is five times as many as the amount last year.

3.As the fact indicates,the educational  program  should fit into the national plan for economic development.

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

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