GWD TN 14 21

制约与平衡

21. 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.


A.but not with other nonhospital services where 20 percent of the costs must be paid by beneficiaries

B.but not of other nonhospital services, making beneficiaries pay 20 percent of the costs

C.but not of other nonhospital services, for which beneficiaries must pay 20 percent of the costs

D.which is unlike other nonhospital services in that 20 percent of the costs must be paid by beneficiaries

E.which is unlike other nonhospital services that make beneficiaries pay 20 percent of the costs

可以排除直接DE。可是不明白ABC都是个什么结构，but not of 怎么用。希望听听大家的回答，谢谢！
（刚才发错区了……）

newalan

后一句实际是but not cover cost of...另外情态动词不能随意省略，所以是选C