（1）As scientists predicted,global pollution has become one of the most serious problems that human being is facing.
如…所言：as…；定语从句修饰最高级用that；one of the +形容词最高级+可数名词复数：…是…中最…之一
（2）It is very fierce about the competition for these positions,the number of applicants is five times of last year.
fierce激烈的;the number of +可数名词复数：…的数量；five times:五倍
（3）As the facts show，the educational programs should fit into the national plan for economic development.
fit into适合，符合；economic经济的；全句用一般现在时
（4）This car burns too much gas,and the price almost is twice as much as another one I want to pay.
as much as 和…一样多;almost几乎
（5）To learn a great national event，we should consider its history and political background at first.
（in order）to…为了… event重大事件；political 政治的
