新PREP PART2 175

dengyichao

Because of wireless service costs plummeting in the last year, and as mobile phones are increasingly common, many people now using their mobile phones to make calls across a wide region at night and on weekends, when numerous wireless companies provide unlimited airtime for a relatively small monthly fee.

A. Because of wireless service costs plummeting in the last year, and as mobile phones are increasingly common, many people

B. As the cost of wireless service plummeted in the last year and as mobile phones became increasingly common, many people

C. In the last year, with the cost of wireless service plummeting, and mobile phones have become increasingly common, there are many people

D. With the cost of wireless service plummeting in the last year and mobile phones becoming increasingly common, many people are

E. While the cost of wireless service has plummeted in the last year and mobile phones are increasingly common, many people are
E为什么不对，因为独立主格结构优于句子吗？

ceciliator

answer should be e?
http://forum.chasedream.com/GMAT_SC/thread-444457-1-1.html

dengyichao

sorry 我把题号打错了，是175题  验证过了 PREP的答案是选D的
我看过http://forum.chasedream.com/GMAT_SC/thread-444457-1-1.html的跟帖了
我觉得一楼的解释不对，就是因为plummet和become的主语不是many people这里才会用独立主格结构的，也不知道是不是我的答案错了，哪位同学帮忙看看