I know nothing about our teacher______ he has been teaching

I know nothing about him he is a teacher I know nothing about him ___ he is a teacher. I know nothing about cooking I want to know how long () A.has he been back B.has he been A;Do you know anything about it B；No,I know nothing…… he tol What do you know about him?I konw nothing about him( )he wor He has nothing _(worry) about. I know nothing about his journey ___ he is likely to be away I know nothing about him _____ the fact that he lives next d 23. I know nothing about him except that he works in ____com Until he told me,I know nothing about it.怎样翻译?多谢前辈指教! 13.I know nothing about him （ ）he is a teacher.