(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。
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