[讨论]GWD 一题SC

mingyao21

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.

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

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

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

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

While the cost of wireless service has plummeted in the last year and mobile phones are increasingly common, many people are

请教答案B & D ???

满溪

dd, 你的帖子贴错地方了。SC,CR有专门的区域，在每个版的置顶精华帖中，你可以找到SC,CR讨论汇总。

yaoyao99

Is the answer D?

The main problem with B, I think, is at the last part.  "Many people now using... when.." is a fragmented sentence.