1.正如科学家预言的那样，全球污染成了人类面临的最严重的问题之一。                            1. As scientist prophesy, the human race faced of global pollution is one of the severe questions.

2.谋求这些职位的竞争很激烈——今年的求职者是去年的五倍。                    Competition  for these positions is fierce(tough)-number of applicant this year is five times as much as last year.

3.正如事实表明的那样，教育大纲应当符合国家的经济发展计划。                              As fact  demonstrate , the education outline should fit into national economic  development  plan.

4.这辆汽车太费油，而且价钱几乎是我想付的两倍。                                                This autumobile burn too much gas, moreover, the price nearly two times as much as I want to pay.

5.要了解一起重大的国际事件，我们首先需要考虑其历史与政治背景。                          Wanted to know an important international  event, we should think its history and politics  background  at first.