—Sorry,I don't know —（ ） 1.thank you 2.that‘s right 3.that's all right 4.all right

—Sorry,I don't know —（ ） 1.thank you 2.that‘s right 3.that's all right 4.all right
—Sorry,I don't know —（ ） 1.thank you 2.that‘s right 3.that's all right 4.all right

—Sorry,I don't know —（ ） 1.thank you 2.that‘s right 3.that's all right 4.all right
3

应该是3，是没关系的意思