d为什么不对呢。。。？

gmatziyu

GWD-9-Q3:

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.

1. Because of wireless service costs plummeting in the last year, and as mobile phones are increasingly common, many people
   
   
2. As the cost of wireless service plummeted in the last year and as mobile phones became increasingly common, many people
   
   
3. In the last year, with the cost of wireless service plummeting, and mobile phones have become increasingly common, there are many people
   
   
4. With the cost of wireless service plummeting in the last year and mobile phones becoming increasingly common, many people are
   
   
5. While the cost of wireless service has plummeted in the last year and mobile phones are increasingly common, many people are
   答案E
   谢谢...
   
   

gmatziyu

JayNicholas

我只能这么说  SC里面WITH结构正确的我在 OG12里面还没看到过  XDF老师上课说这个结构就可以直接当做错了  
这题WITH句子后面的主语是人    而WITH句子里又有自己的主语  所以不对

ogram

GMAT有一个句子优先的原则
如果分句的主语和主句的主语不同，则优先用句子的表达方式，而不是用分词短语来表达。除非分词短语的逻辑主语跟主句的主语相同。
这里交代的2件事情有明确的主语cost of wireless service 和mobile phones ，而且不同于主句的主语many people，因此用句子来表达比较好。