P70

（1）As scientists foresees ,global polution has become one of the most severe problems that human confront.

(2)The competition for seeking the position is fierce,this year’s applicant number is five times as much as last year’s.

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

(4)The car burns too much gas,and the price is almost twice as much as what I think.

(5)To know an international event,we should think its history and politics background at first.

P71

It’s hard to think about that how forefathers did the life without so many conveniences of today’s technology.In that times,only a little proportion of people enjoyed comforts,while the vast majority couldn’t be full.not to speak of the privilege to take the education.However,many people blame modern technology.They assume it has brought about many problems.They wanted to slow down the development speed .In fact,nobody can prevents the advance of the times.