gwd-19-3 没讨论过的

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

答案是d,我选的e~

同意E.

D: With the cost... and mobile phone..., many people are... - 虽然平行对称,但with结构不对.这个错误更严重.

Open to discuss.

如何不对呀？

倒是E里的has plummeted和are不太平行