OG 87

87. Beyond the immediate cash flow crisis that the museum faces, its survival depends on if it can broaden its membership and leave its cramped quarters for a site where it can store and exhibit its more than 12,000 artifacts.

(A)  if it can broaden its membership and leave

(B)   whether it can broaden its membership and leave

(C)  whether or not it has the capability to broaden its membership and can leave

(D)  its ability for broadening its membership and leaving

(E)   the ability for it to broaden its membership and leave

Choice A is faulty because it uses the unidiomatic construction depends on if; whether is required to connect depends on with the clause beginning it can....(whether引导名词从句，而且，讨论是否问题，if有overuse之嫌) Choice C uses whether or not where only whether is needed, includes the awkward and wordy construction has the capability to, and unnecessarily repeats the idea of capability with can(整个就是一个不简洁错误大全). Choices D and E use unidiomatic constructions where the phrase its ability to broaden is required. Choice B--idiomatic, concise, and correct--is best.

问题: its ability to broaden 和its ability for broadening 有什么区别

总是弄不清楚这种类型的区别.

请指点,谢谢

固定用法,记住就是了.