定语从句语法知识Thereason_____which或that_______hetoldmeisthathecaughtcold.Thereason___why___hewasillisthathecaughtcold.这两个为什么一个用WHY一个用WHICH有什么区别啊?

　　定语从句语法知识

　　Thereason_____which或that_______hetoldmeisthathecaughtcold.

　　Thereason___why___hewasillisthathecaughtcold.

　　这两个为什么一个用WHY一个用WHICH

　　有什么区别啊?