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 请问这题大家觉得答案是??D or E 我觉得很难选 如果D 可是becoming increasingly 不是语意重覆吗 感觉也有脱节阿 E 时态错的挺明显的 而且前後时态不一致 用While 前後对比的语气也怪怪的 所以答案是??? 谢 --

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