1 who 引导，修饰“人”

　　Those who…. ……的人……

　　Students who…… ……的学生……

　　Children who…… ……的孩子……

　　Those who feel that sports stars’ salaries are justified might argue that the number of professionals with real talent are very few.

　　Student without teachers will surely be lost; but students who simply rely on teachers for knowledge are not really learning.

　　Children who enter school at an early age are generally more confident and independent than children who stay at home with their parents

　　2 that 引导，修饰物

　　Likewise, economics is a fundamental discipline that allows societies to best able and move forward

　　The workload that could take months to finish by manual labor could be done flawlessly by robots in minutes

　　How to handle criminals is a problem that all courtiers and societies face

　　Advertisement is an effective marketing tool that almost every company uses.

　　3逗号加which

　　修饰前面整个句子(非限制定语从句)，这种从句非常好掌握而且也容易拿到高分，所在考生可以重点在这个句子上花些时间。

　　If fuel prices go up, either fewer people will drive or people will drive less, which makes sense for reducing pollution

　　Demand for various commodities creates a huge market for the local and international businesses, which in turn increases demand for the labor market

　　Governments should develop and launch a good traffic control system, which can monitor and facilitate traffic flows on major roads for better and safer usage, reducing the chances of accidents.