it is the part of the face( that )gives a person special character.

题目

it is the part of the face( that )gives a person special character.
引导定从为什么这里不能用which?

答案

你好,这题必须填that
It is . that 是典型的强调句结构
it is the part of the face that gives a person special character
题中强调 脸的部分体现了一个人的特殊品质.