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题库 / Prep2008E1-SC-197
Not only did the systematic clearing of forests in the United States create farmland (especially in the Northeast) and gave consumers relatively inexpensive houses and furniture, but it also caused erosion and very quickly deforested whole regions.
Not only did the systematic clearing of forests in the United States create farmland (especially in the Northeast) and gave consumers relatively inexpensive houses and furniture, but it also
Not only did the systematic clearing of forests in the United States create farmland (especially in the Northeast), which gave consumers relatively inexpensive houses and furniture, but also
The systematic clearing of forests in the United States, creating farmland (especially in the Northeast) and giving consumers relatively inexpensive houses and furniture, but also
The systematic clearing of forests in the United States created farmland (especially in the Northeast) and gave consumers relatively inexpensive houses and furniture, but it also
The systematic clearing of forests in the United States not only created farmland (especially in the Northeast), giving consumers relatively inexpensive houses and furniture, but it
题目分析：
本题主要考查了not only和but also以及单独的but also的语意区别。
选项分析：
A选项：not only位于句首时，其引导的句子需要用倒装，give和create是由并列连词and连接的两个并列成分，而由于时态已经被did提前，因此只能用原形，即，gave需改为give。另外，not only…but also…表示其连接的两者是递进关系，也就是说其连接的两件事应该是同方向的。在本题中，提供便宜的家具是好事，但是使得森林沙漠化则是坏事。因此，这两件事应该是转折关系而不是递进关系。
B选项：非限定性定语从句 which gave consumers relatively inexpensive houses and furniture应就近修饰名词farmland。显然地，给消费者便宜的家具的应该是“系统化的砍伐森林”，而不是“农场”。另外，连词 not only…but also…错误同选项(A)。
C选项：本选项具有语法错误，but是连词，其需要连接两个句子。但本选项中but身前缺少谓语动词。
D选项：Correct. 本选项在语法和逻辑上均是正确的。
E选项：连词 not only…but also…错误同选项(A)。
B选项说not only…… but also……的错误同A，但是B里面的gave是which引导的从句的谓语，为什么能够因为主句did前置而相应改为give呢？
A选项里create和give是并列成分，因为时态did被提前，所以create用了原形，give也应当用原形。
B选项里which引导的是定语从句，修饰farmland,和create的内容不是并列关系，所以gave的用法是没问题的。我觉得B选项有三处错误：1. 逻辑意思上，不是farmland给消费者提供了便宜的住房和家具，而是clearing,因此定语从句的使用是不对的；2. Not only...but also表示递进关系，但intended meaning应当是转折；3. but后面却少主语。
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