i don't know ____ book this is.

i don't know ____ book this is. i don't know ____ book this one is?英语 I don't know _____ ____ this book is.【我不知道这本书多少钱】 --This is for you.--You ____ have!I don't know how to thank I don't know how we use this computer=i don't know_____ ____ Whose watch is this?( ),I don't know. I don't know what this is for me? This is a boy.I don't know ____ name.A.it's B.his C.he's D.h How old is he? I don't know （变为同义句）I don't know ____ ____ I don't know ( )A、what book you like B、what book is you like Shirley ____ a book about China last year,but I don’t know w 1 I don't know ____