如何写作CET-4命题作文？
命题作文是大学英语四级考试大纲所规定的一种题型，其形式指的就是出题者只给出一道作文题目，要求我们根据标题写作。命题作文内容特别灵活，我们有很大的发挥余地，甚至连文体也可能有不同的选择。因而，我们在写命题作文时，一定要在文体和主题上认真考虑，做出正确决断。
我们可看下面的例子：
Directions: For this part, you are allowed 30 minutes to write a composition about “Beauty”, you are required to explain the meaning of beauty and show your own personal view. Your composition should be no less than 120 words. Remember to write it neatly.
【范文】
Beauty
Beauty usually refers to what appeals to the eye. A nice and well built girl is regarded as beautiful. A bunch of vigorous flowers are also considered as beautiful. A splendid waterfall coming down from a mountain is as well looked on as beautiful.
Beauty also refers to what appeals to the mind. The virtue of the Chinese nation-industry and bravery are taken as beautiful, because it helped to produce such a magnificent culture in the world. Einstein’s theory of relativity is also perceived as beautiful, for it explains many natural phenomena so perfectly.
Beauty is around us. If you keep an eye or pay some attention, it is never difficult to find something beautiful somewhere about you. Wonderful natural spots, historical relics, fine arts, splendid buildings, and kind people are just a few inches away.
本文是一篇根据命题展开的说明文。作者根据命题的提示，开篇就直接用解释法说明 Beauty的含义，并用举例法进一步进行详细说明。第二段进一步说明了Beauty的深层含义——即内在美（包括心灵美和智能美）。第三段又从另外一个角度谈论美，说明了美无处不在，生活中处处充满美。
参考文献：英语作文高分必背丛书：大学英语四级写作/李华田主编，武汉大学出版社，2005
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