议论文以议论为主要表达方式，在书面表达中很常见。论点、论据和论证是议论文缺一不可的三要素。在议论文中，作者先就某一问题或现象提出自己的观点，然后辅之以相关的论据，并在此基础上作逻辑和理论上的论证，这是全文的主要部分，最终得出结论。常见的议论文有科学社论、杂文、评论等。高考书面表达以评论为主，写作时，应注意以下几点：

　　1. 结构完整，条理清楚，论证严谨;

　　2. 语言精练，准确易懂，明确表达作者的观点;

　　3. 以议论为主，以说明、叙述、描写等为辅;

　　4. 重在说理，摆事实讲道理，切忌空泛无物。

　　高考议论文的写作通常采用的是归纳推理法和正反对照法。例如(2005全国卷Ⅲ)：

　　假设你是李华，最近国内一家英文报纸正在讨论北京动物园是否应迁出市区。以下是你所在班级讨论的情况。请你给该报写一封信，反映讨论结果。

　　注意：

　　1. 词数100左右，信的开头已为你写好。

　　2. 可根据内容要点适当增加细节，以使行文连贯。

　　3. 参考词汇：郊区 - suburb

　　One possible version

　　June, 3th 2005

　　Dear Editor,

　　Recently, our class have had a heated discussion about whether the Beijing Zoo should be moved out of the city. Some of my classmates are in favor of the move. They say large crowds of tourists to the zoo will result in traffic jams. They also say that once moved, animals will have more space and better living conditions in the suburbs. However, other students are against the idea, saying that the Beijing Zoo, built in 1906, has a history of 100 years, and is well-known at home and abroad. So it should remain where it is. What’s more, moving may cause the death of some animals. To move or not, this is a big decision which has to be made by people in Beijing.

　　Yours truly,

　　Li Hua