题目内容：

（ ）sometimes keeps her awake at night ( )TOM is getting more and more quiet at home
A.That which B.It that
C.whether what D.what that
请说明理由

优质解答

看一看定语从句,同位语从句和主语从句的语法 修饰人只能that or who 首先排除A和C 第一空应该为it 形式主语
B