三、典型段落操练
要求：请撰写下列作文，注意其中说明危害段或说明好处段的写法。
练习一
Directions:For this part，you are allowed 30 minutes to 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共同关注的问题。
2.参考书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 to 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(https://www.daowen.com)
第一段：概述问题段
Nowadays reference books have become a problem of great concern for both teachers and students.There are many kinds of reference books available in the book market.A smarter use of these books is certainly beneficial，but the misuse and overuse of them may cause a lot of harm.
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 teacher 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 the 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，reference 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 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 with 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 strengthen 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.