I don't know lucy,but I the( )girl

I don't know lucy,but I the( )girl but i don't know I'm sorry,but I don't know the answer. I don't know the girl () Lingling in your school. but't i don't know the way______the hospital I don t know ,but I believe I don't(know)the teacher,but I(know about)her.可以换成know about I don't know the __ income of the family,but I do know it is I don't know the ____ income of the family,but I do know it But I don\'\'t know why you To tell you the truth,Lucy,I don't even know the name of his I don’t know the man you mention,but of course I know ______