【问题】 It worried her a bit ______ her hair was turning gray.( )·when·if·for·that

It worried her a bit ______ her hair was turning gray.( )·when·if·for·that

正确答案:单选题·that

题目解析:本题出自佳木斯大学,佳木斯大学语言治疗学,由丰阳塔题库搜集整理。