There is thing as a free lunch. There may be a hidden cost.A. no suchB. not suchC. no soD

问题补充：

There is thing as a free lunch. There may be a hidden cost.

A. no such

B. not such

C. no so

D. not so

答案：

(答案→)A. no such

B. not such

C. no so

D. not so

解析：there is no such thing=there is not such a thing. So修饰的是形容词，而此处thing是名词，故不能选。