三、典型段落操练
要求：撰写下列作文，注意其中说明危害或说明好处段的写法。
练习一
Directions : For this part , you are allowed 30 minutes write a composition on the topic How to Make Full Use of Reference Books . You should write at least 120 words , and base your composition on the outline ( given in Chinese ) below :
1.参考书泛滥已成为师生工同关注的问题。
2.参考收泛滥带来了哪些危害？
3.作为大学生，应该如何正确选择和使用参考书。
练习二
Directions : For this part , you are allowed 30 minutes write a composition on the topic Social Practice . You should write at least 120 words and base your composition on the outline given below :
1.近年来各大学纷纷开展社会实践活动。
2.社会实践能给学生带来哪些好处？
3.“我”对社会实践的看法。
参考范文
练习一
How to Make Full Use of Reference Books
第一段：概述问题段
Nowadays reference books have become a problem of great concern for both thachers and students . There are many kinds of reference books available in the book market . Asmarter use of these books is certainly beneficial , but the misuse and ouveuse of them may cause a lot of harms .
第二段：说明危害段
First of all ,teaching reference books might make the students less attentive in class . Armed with reference books , many students may think that they know what the tcacher is going to talk about . So they may not listen to the teacher in class at all . Secondly , some students rely on the reference books too much , which is unfavorable to the improvement of their ability to work out me solutions for themselves . Thirdly , there are some reference books filled with mistakes , which might mislead students .
第三段：说明方法段
Considering the above-mentioned , we should be careful in selecting and using references books . Firstly , we should check the contents of the book carefully but not only pay attention to the brand of publishing house . In addition , we can turn to the recommendation of teachers and students around us . Besides , refereence books are just an assistant , so we couldn't rely on them too much . Only in this way can we make full use of reference books .
练习二
Social Practice of College Students
第一段：概述现象段
Nowadays many universities encourage and organize students to take part in social practice activities . During the holidays , more and more students choose to be the volunteers , take part-time jobs , or take part in other practical activities alike . It's obvious that social practice is playing a more and more important role in China's college education .
第二段：说明好处段
Undoubtedly , college students have benefited a lot from social practice . Above all , they are provided whth more opportunities to contact the real world outside the campus . Moreover , in social practice activities , students can apply their knowledge to the solution to the practical problems . So their practical skills are improved greatly . Besides , social practice helps strengvthen students ' sense of social responsibility .
第三段：总结观点段
Considering the above-mentioned , I think , it is necessary for college students to participate in social practice . However , social practice may bring some problems . For example , some students spend too much time in taking part-time jobs so as to ignore their study . Therefore , we should try to balance the relationship between social practice and study .