2013年GMAT考试:语法练习精讲(二十六)
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例:Whereas the use of synthetic fertilizers has greatly expanded agricultural productivity in many parts of the world, an increase in their use can create serious environmental problems such as water pollution, and their substitution for more traditional fertilizers may accelerate soil structure deterioration and soil erosion.
(A) an increase in their use can create serious environmental problems such as water pollution, and their substitution for more traditional fertilizers
(B) an increase in their use can create serious environmental problems like water pollution, and if substituted for more traditional fertilizers, it
(C) if these fertilizers are used increasingly, they can create serious environmental problems such as water pollution, and if used as substitutions for more traditional fertilizers, they
(D) the increased usage of these fertilizers can create serious environmental problems such as water pollution, while if substituted for more traditional fertilizers, this substitution
(E) the increased usage of these fertilizers can create serious environmental problems like water pollution, while their substitution for more traditional fertilizers
 原文意思: 使用化肥极大地扩大了农业产量, 化肥的使用也会导致环境污染并且化肥的使用也会加速土壤的恶化。
 题目分析: 原文有一个并列关系,就是化肥的使用会导致 A 和 B 两种结果,A 选项 and 前后写的比较对应,留着。B 选项 and 后面跟 if substituted,和前面无法对应,干掉。C 选项 and 后面也用 if 和前面不对应,干掉。D 后面用 if substituted 和前面不对应,杀。E while 后面用their substitution 前面用 increase usage, 如果这么写就是 usage 和后面的 substitution对应了,我强调的意思是化肥使用的增加和化肥代替传统饲料,是 increase 和后面的substitution 形成对应,E 虽然语法写的比较对应,但是对应的地方错了,杀!


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