The place interested me most was the Childrens Palace.A. WhichB. whereC. whatD. in which

问题补充：

The place interested me most was the Childrens Palace.

A. Which

B. where

C. what

D. in which

答案：

(答案→)A. Which

B. where

C. what

D. in which

解析：which用作关系代词，在定语从句中作主语。