③ 污染环境 What`s more/In addition, private cars give off/ discharge/ release CO which pollute the environment/ air.
注意：所谓上义词是指抽象、概括和笼统的，就是比较superordinate的词；而下义词就是具体的东西，即subordinate的东西。
第四段（总结段）的写法：
① Despite all the disadvantages mentioned above, I still think that the advantages outweigh/ are greater than the disadvantages. As for the above problem, I`m sure they will be settled by the scientists in the future/ It is only a matter of time for the problems to be solved.
② Unquestionably, the challenge of private cars means we all should consider how we can control them, so that they will not control us.
③ Whether the private cars are a blessing or a curse is a difficult question to answer, yet the desire for the comfort and independence a private car can bring will not be elminated.
④ Anyway/ Anyhow/ In any case, whether the effect is good or bad, one thing is certain: private cars have changed and will continue to change the way of our transportation, our leisure and our life.
选择题型变体逻辑结构（My View on Sth.）
选择性观点的变体的文章写作逻辑结构：
Paragraph  I:（1）引出将要评论的事物或者是观点； （2）简明扼要的提出人们在这个问题上的两种不同看法。
Paragraph  II:（1）提出作者观点（本文主题句）；
                      （2）举例加以论证。
Paragraph III:（1）总结全文（再次强调作者观点）
范文17. My View on Fate
There is no consensus of opinions among people as to the view of fate. Some people believe that everyone is born to a certain that he can not change, while some other people think that every man is the master of his own life.
注：1. consensus 相同意见
 2. 第一句话可以套用，如范文18：There is no consensus of opinions among people as to the view of wealth.