prep2-40感觉语法越学越糊涂。。。快晕了

78. As it is with traditional pharmacies, online 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, online drugstores rely on prescriptions to be successful

B.       As with the case of traditional pharmacies, online drugstores rely on prescriptions to have success

C.       As is the case with traditional pharmacies, prescriptions are the cornerstone of a successful online drugstore

D.      As traditional pharmacies, so online drugstores rely on prescriptions to be successful

E.       Like traditional pharmacies, the cornerstone of a successful online drugstore is prescriptions

答案选C，我也做对了。可是对于B中的 as with觉得有疑惑。 解释说as with he case 用法错。可是明明有as with 的用法呀。举例如下：

1， As with any drug taken in excess, your body can build uo a tolerance to it.

2,As with all oily hair treatments, shampoo needs to be applied first.

as with后面的东西有伴随着主语的意思，并不是并列关系

我是从CD上的语法点讨论贴里搜来的。如下。讨论贴里面对AS WITH的解释是：the same as all the others

另外，我还想问一下，as with是主语的伴随状语的省略形式吗？可是白勇讲状语从句的省略形式不可以是: 连词＋介词短语或名词短语，只有once 和whether例外。我把一开始把as with就是因为这个。

From Collins Cobuild 4.0

With breast cancer, as with many common diseases, there is no obvious breakthrough on the horizon...

As with any drug taken in excess, your body can build up a tolerance to it.

As with all oily hair treatments, shampoo needs to be applied first.

As with many technological revolutions, you are unlikely to be aware of it.

As with other single parents, economic needs influenced Schramm's decision to live in a New Beginnings community.

As with the other Nutrigroups, as you process, and add salt and fat, the Nutripoints go down.

You can mortgage a condo and borrow on your investment as with a regular house.

Keep in mind, though, as with the movement of the left knee, the raising of the left heel must be in reaction to the upper body turn.

As with any lost pet, notes Krisch, bird owners should not stop looking after only a week or two.

jandjshi and some good friends:  where are you?