Question

She is the only one of the persons ________ from the mistakes. A．whom I know have learned B..

She is the only one of the persons ________ from the mistakes. A．whom I know have learned B．whom I know has learned C．I know who has learned D．I know who have learned

Answer 1

C

考查定语从句，one of+ 复数名词，前面被the (only )修饰时谓语动词用单数形式，所以选C, I know 做插入语，who 在定语从句中做主语，句意：他是我认识中的唯一一个从错误中学习的人。