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.

答案是D，

我认为这里的E 也应该可以， 虽然while 分句中的时态不同， 但是如果 common这里用的对的话，也算有各自的时间状语了吧

请高手赐教

顶下

上午迷糊了

common这里是做修饰 mobile Phones的，并不是修饰 整个句子时态的， 所以 D的两个分句短语的时态还是不对称

对吧？

我觉得时态有问题

同意4楼,用完成时无根据

如果选E的话,这个句子就有两个状语从句了,一个是while...一个是when...