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
實在有點難懂!!