[求助]GWD17-Q21一道语法题之前没见有人开贴讨论，今天请教下

 GWD17-Q21:

Medicare, the United States government’s health insurance program for the elderly and disabled, covers the full cost of home health care, but not with other nonhospital services where 20 percent of the costs must be paid by beneficiaries.

1. but not with other nonhospital services where 20 percent of the costs must be paid by beneficiaries
2. but not of other nonhospital services, making beneficiaries pay 20 percent of the costs
3. but not of other nonhospital services, for which beneficiaries must pay 20 percent of the costs
4. which is unlike other nonhospital services in that 20 percent of the costs must be paid by beneficiaries
5. which is unlike other nonhospital services that make beneficiaries pay 20 percent of the costs

答案是C.但偶怎么都想不通耶。偶选滴是E. 还请大牛们指点!

以下是引用yangliu0401在2009-3-1 4:04:00的发言：

 GWD17-Q21:

Medicare, the United States government’s health insurance program for the elderly and disabled, covers the full cost of home health care, but not with other nonhospital services where 20 percent of the costs must be paid by beneficiaries.

1. but not with other nonhospital services where 20 percent of the costs must be paid by beneficiaries
2. but not of other nonhospital services, making beneficiaries pay 20 percent of the costs
3. but not of other nonhospital services, for which beneficiaries must pay 20 percent of the costs
4. which is unlike other nonhospital services in that 20 percent of the costs must be paid by beneficiaries
5. which is unlike other nonhospital services that make beneficiaries pay 20 percent of the costs

答案是C.但偶怎么都想不通耶。偶选滴是E. 还请大牛们指点!

我觉得从对称上理解, C更合适，而E不具有对称的结构

covers the full cost of home health care, but not of other nonhospital services, for which beneficiaries must pay 20 percent of the costs.

同时E不能正确的表达题目想表达的意思,容易引起歧义

正确答案C所表述的意思是 能cover home health care 的full cost,不能cover other non的full cost, 对于nonh service, 要支付20%,言外之意就是说,这个program 能cover 80%的 nonh service.

再看E

B can be confused. Making... 可以是整句话的结果状语从句，同样也可以修饰nonh service

这里我觉得but前要加逗号的目的,其实就是为了格开句尾分词making beneficiaries ,让它只能修饰but以后的部分. 如果but前没有逗号,整个句子从开头,到 making之前都是一个整体,这个making分词结构修饰整个整体句子所表达的情况,明显不对. making只是用来修饰后半句,即but以后的内容.

http://forum.chasedream.com/dispbbs.asp?boardid=23&replyid=2933446&id=259547&page=1&skin=0&Star=2

Now, i think B is wrong becase it omits MUST

看我上面的回帖

同时E不能正确的表达题目想表达的意思,容易引起歧义

正确答案C所表述的意思是 能cover home health care 的full cost,不能cover other non的full cost, 对于nonh service, 要支付20%,言外之意就是说,这个program 能cover 80%的 nonh service.

再看E

恩

帮我把下面那个prep2-55看一下吧，谢谢

That's the point!