While the cost of wireless service has plummeted in the last year and mobile phones are increasingly common, many people are 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.
3. used to emphasize the difference between two situations, activities etc - Schools in the north tend to be better equipped, while those in the south are relatively poor.
While the cost of wireless service has plummeted in the last year and mobile phones are increasingly common, many people are 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.
我补充一点：美国无线电话公司提供服务是一个手机用户可以随便地使用手机在晚上或周末。(unlimited night and weekend minutes for 5 largest national wireless carriers). so the when is used to describe night and weekend.
D is my choice. The reasons are as following: 1, There is an important principle of SC in GMAT: DO NOT CHANGE THEMEANING OF THE ORIGINAL SENTENCE. We can get a clear clue, which theunderline part expresses reasons, from the original sentence. Echanges the meaning because it contrasts the meaning of main clasuse. Dkeeps the original meaning. 2, Generally to say, When "while" introduces a clause to express acontrastive meaning to main clause, the sentence structures of bothmain clause and subordinative clause should be similar. 3, In E, present perfect is not suitable in here. If the adverb pharse"in the last year" changed to "in the last ten year", present perfectwould be suitable. This is very subtle to non-English speaker.
By the way, Some XDJMs try to get help from foreigners. I encourge youto do so because they usually have a better sense in English than youdo. But you never consider their opinions superstition. Were theyalways right, most of native speakers would get a full mark of verbalin GMAT.
D is my choice. The reasons are as following: 1, There is an important principle of SC in GMAT: DO NOT CHANGE THEMEANING OF THE ORIGINAL SENTENCE. We can get a clear clue, which theunderline part expresses reasons, from the original sentence. Echanges the meaning because it contrasts the meaning of main clasuse. Dkeeps the original meaning. 2, Generally to say, When "while" introduces a clause to express acontrastive meaning to main clause, the sentence structures of bothmain clause and subordinative clause should be similar. 3, In E, present perfect is not suitable in here. If the adverb pharse"in the last year" changed to "in the last ten year", present perfectwould be suitable. This is very subtle to non-English speaker.
By the way, Some XDJMs try to get help from foreigners. I encourge youto do so because they usually have a better sense in English than youdo. But you never consider their opinions superstition. Were theyalways right, most of native speakers would get a full mark of verbalin GMAT.
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发表于 2004-12-23 23:25:00
