1.As scientists predicted,global pollution has become one of the most serious problems facing the human race.
2.Competition for seeking these positions is tough,the number of the applicants is five times of last year.
3.As the fact indicated,educational outline should fit into the economic development plan of country.
4.The car burns too much gas,moreover the price almost is twice of one I want to pay.
5.In order to learn a international event, we should consider its history and politics background.
