The skin is an essential part of your body and is you feel cold heat or pain.A. whereB.

问题补充：

The skin is an essential part of your body and is you feel cold, heat or pain.

A. where

B. which

C. what

D. how

答案：

(答案→)A. where

B. which

C. what

D. how

解析：这题考查表语从句的用法：句意是：皮肤是身体必要的部分是你感到冷热或疼的地方。选A。