1) a. In order to prevent the problem becoming too serious to solve, we must take an immediate step.
    b. An immediate step must be taken before the problem becomes too serious to solve.
2) a. In order to build a stable and prosperous nation, people should make new efforts.
    b. New efforts will bring ...
4. More and more
1) a. More and more people now prefer to stay at home and watch TV.
 b. People in ever increasing numbers prefer to stay at home and watch TV.
2) a. More and more people who become more and more rich can afford a motorcycle.
 b. The growing number of people who become increasingly rich can now afford a motorcycle.
3) a. More and more teenagers smoke cigarettes in recent years.
 b. Teenage smoking is on the rise/ increase/ decrease/ decline in recent years.
4) a. More and more teachers are needed with the development of economy.
 b. There is an increasing demand for teachers with the development of economy.
5) a. More and more trees have disappeared in the city.
b. There is a sharp decline in the number of trees in the city.
社会热点话题
写作练习：Jobs for Graduates
1) 大学生难找工作
2) 原因很多
3) 解决的办法
        With the fantastic development of modern society, people in ever increasing numbers have access to tertiary education （高等教育）. As a result, job-hunting is now becoming headache for most graduates.
范文23：Nowadays, college graduates come to realize that it is not easy to get a rewarding job. Most/ Many of them can not get a job right after graduation.