In order to become successful, you must first explore your talents and get to know yourself so as to find out ________ your real interests lies．

A.that

B.which

C.what

D.where

答案及解析： D

解析：

引导find out的宾语从句，表示地点，因此用where。从句的意思是“你真正的兴趣所在”。