备考GMAT语法，要吃透大纲的范围，做到非大纲语法先不看或少看，要注重基本语法，适当结合考点扩充。最终寻找适合自己的思维习惯和GMAT考试技巧，应对考试，接下来小编就给大家介绍一下GMAT语法GWD经典例题，希望对大家备考GMAT语法考试有帮助。
Recently physicians have determined that stomach ulcers are not caused by stress, alcohol, or rich foods, but a bacterium that dwells in the mucous lining of the stomach.
A. not caused by stress, alcohol, or rich foods, but
B. not caused by stress, alcohol, or rich foods, but are by
C. caused not by stress, alcohol, or rich foods, but by
D. caused not by stress, alcohol, and rich foods, but
E. caused not by stress, alcohol, and rich foods, but are by
翻译：
最近医生已经确定，胃溃疡不是由压力，酒精，或者过多的食物引起的，而是由寄居在胃黏膜上的细菌造成的。
句式：
Recently physicians have determined that......are not by.....but by;
思路：
Not by.....but by 并列要前后平行
选项：
A. Not caused by but 前后不平行
B. Not caused by but are by 前后不平行
C. 正确
D. Not by but 前后不平行
E. Not by but are by 前后不平行
以上便是前程百利小编为大家推荐的GMAT语法GWD经典例题相关内容，每天练习可以帮助大家有效的提高GMAT语法能力，相信通过大家认真努力备考在以后的GMAT考试中一定会取得满意的成绩。
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