Q21:

Medicare, the LACE w:st="on">United StatesLACE> 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

可以帮我看一下为什么B不对吗？

C中的which指称是不是清楚？

还有如果我把前面的making beneficiaries pay 20 percent of the costs

当成是covers the full cost of home health care, but not of other nonhospital services,

所导致的伴随状语不可以吗？ 谢谢

B只要问一下Making的主语是谁，就觉得不对了。

C which指的就是services