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
为什么D不行,分词修饰对象不对,有些不明白,E不是改变了时态么??
D. With the cost of wireless service plummeting in the last year and mobile phones becoming increasingly common, many people are
D is not right b/c the time frames are confusing.
the above two clauses shouldn't be paralleled since one is talking about the past year while another is talking about now.
E is correct b/c it reflects the two different time frames.
我感觉D也没什么太大问题。。。
不过平常做题的时候，如果看到 in the last year时，基本用完成时态。
另外with的表达尽量不要句式太复杂，这ms gmat考试里不好的表达结构。
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