求助PREP2-Q39

evelyn205205

As it is with traditional pharmacies, on-line drugstores rely on prescriptions to be successful, since it is primarily prescriptions that attract the customers, who then also buy other health-related items.

(A) As it is with traditional pharmacies, on-line drugstores rely on prescriptions to be successful
(B) As with the case of traditional pharmacies, on-line drugstores rely on prescriptions to have success
(C) As is the case with traditional pharmacies, prescriptions are the cornerstone of a successful on-line drugstore
(D) As traditional pharmacies, so on-line drugstores rely on prescriptions to be successful
(E) Like traditional pharmacies, the cornerstone of a successful on-line drugstore is prescriptions

答案是C。
语法笔记里面对于B为什么错以及C为什么对没有做具体的说明。
望NN给予帮助

evelyn205205

顶一下，大家帮帮忙啦~

evelyn205205

为神马B错呢？

毛毛carina

http://forum.chasedream.com/GMAT_SC/thread-476964-1-1.html?extparms=ThreadCatalogID%3d0%26page%3d121

毛毛carina

B的固定搭配就不对哦

evelyn205205

好吧，就是把这个记住咯~
对了，毛毛，你应该杀过G了吧~