一道GWD争议语法题目的PREP软件的答案 但是为啥D?

keykeyxx

1．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.

1. 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
2. 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
3. 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
4. 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
5. 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

做prep模考软件的时候 答案是D，为啥捏？

那个光盘是GMAC寄来的正版PREP。

[此贴子已经被作者于2009-6-13 11:07:45编辑过]

red_hat

读完整个句子，说systematic clearing... 带来一些好处，但也带来一些坏处

a> not only ... but also 结构错误

b> which 指代错误 给予更便宜的房子和家具的是 systematic clearing...

c>not only ... but also 结构错误

d>正确

e> not only ... but also 结构错误