1.Don’t talk about such things of __________ you are not sur

1.Don’t talk about such things of __________ you are not sur 1. Don’t talk about such things of __________ you are not su 定语从句 1. Don’t talk about such things of __________ you are n 定语从句 1.Don’t talk about such things of __________ you are no 1.Don’t talk about such things of _______ you are not sure. Don't talk about such things of （） you are that ,区别Don't talk about such things ,（）you are not sure of. Don,t talk about such things you are not sure of? Don't talk about such things ( ) you are not sure of.A.that 1.Don't talk about such things ___you are not of. Don't talk about such things___you are not sure of Don't talk about such things that you do not understand