As a green hand he doesn’t know it takes to start a business here.A. whenB. howC. whatD.

问题补充：

As a green hand, he doesn’t know it takes to start a business here.

A. when

B. how

C. what

D. which

答案：

A. when

B. how

(答案→)C. what

D. which

解析：句意：做为一个新手，他不知道在这里开始创业需要什么。What引导宾语从句，在宾语从句中，what做take的宾语。所以选C。