1.Just as the scientists predicted ,the global pollution has become one of the most serious problems that people have to face

2.The competition of searching these positions is so intense that the number of the applicants is five times of last year.

3.It’s shown as the fact that the educational principals should fit into the plan of the national economic developments.

4.This vehicle burns too much gas, moreover the price is almost twice of what? I want to pay for .

5.To understand an important international event ,the first thing we should consider is the background of its history and policy.