Do you know what your children will do with you when you are as old as me?快

what do you know Do you know what Do you know what? what do you know是什么意思? Do you know ,what's - If you know what will you do Do you know what I like you do you know what you said what you name Do you know me Do you know what he_____(do) now? You never know what you can do until you try. You never know what you can do until you try. do you know what i do?can you guess? Do you know what they_______(代表）? Do you know what they are? what’s this( )English?Do you know? do you know what things come from What do you know about Halloween?