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题库 / Prep2007E2-SC-39
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.
As it is with traditional pharmacies, on-line drugstores rely on prescriptions to be successful
As with the case of traditional pharmacies, on-line drugstores rely on prescriptions to have success
As is the case with traditional pharmacies, prescriptions are the cornerstone of a successful on-line drugstore
As traditional pharmacies, so on-line drugstores rely on prescriptions to be successful
Like traditional pharmacies, the cornerstone of a successful on-line drugstore is prescriptions
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句子中想表现对比关系，那么as要引导句子。
B：Since “as” has been used for comparison in this choice, it must be followed by a clause. But “with the case of traditional pharmacies” is a prepositional phrase and not a clause.
C： “As” is followed by a clause. Also, this choice maintains the parallelism by using “is” and “are”. What is the case with traditional pharmacies? It is that prescriptions are the cornerstone for their success. Hence, the comparison is parallel here.
"with the case of" is an incorrect rendering of "as is the case...".
(it's possible for "with the case of" to be correct, but the preposition "with" would have to make sense, AND you'd have to be literally talking about "the case of" something.
for instance: the lawyer made history with the case of X, as with the case of Y
unlike this example, the problem in this thread doesn't satisfy either of these requirements)
"is/was the case" is a construction that is allowed to stand for the entire idea in the rest of the comparison; it does not require any sort of grammatical parallelism, so there's really no such thing as "omitted words" here.
A it is只能指代drugstore才对等
句子结构：As is the case with…, prescriptions are… 比较结构。
考点：比较
1) 比较的习惯用法，as be the case (with)…，是prep新出现的固定搭配，是as the case be的倒装表达，常见的错误用法有：as it be; than be the case; as in/with the case of等。
(A) as it is with…搭配错误，it无指代，不能指代后面这个句子。
(B) as with the case搭配错误。
(C) 正确，as be the case with…连接比较对象。
(D) 应该是as A do, so B do结构，缺少do。
(E) like连接比较对象不对等，pharmacies和cornerstone。
E：前后比较的对象是traditional pharmacies和the cornerstone of a successful on-line drugstore，排除E；
B：前后比较的对象是case 和 drugstore，不具有可比性，排除B；
D：as ... so ...的结构使用出错，正确的结构是as A do, so B do。排除D；
A：as it is with…搭配错误，it 无指代，不能指代后面这个句子。排除A。
C：as + be + the case with A, B ... 是新出现的固定搭配。此搭配需学会消化。
B中的case与store不可比
As is with N, 后面句子主语不用和前面一样