Whose book is it It's mine book,这句话哪里错了?

whose book is it 急 改为复数；WHOSE BOOK IS IT She asked me if I knew( ) A.whose book it is.B.whose book is it C.whose book it was.D.whose book wa whose book is it?--it's of me 对么? whose book is it?--it’s of me 对么? She asked me if I knew ( ).A、whose book it isB、whose book is itC、whose book it wasD、whose book was it Whose Frebch book is this?It could be_______(Ali) Whose book is it It's mine book,这句话哪里错了? Whose bike is it? Whose it is? Whose jacket is it? whose coat it is? whose hat is it whose book is it 加上插入语do you think ,后边就要变成it is whose book is it it is ( ) 他的或她的,用什么格式 A:whose book is it?B:It's() 1.me 2.mine 3.ny A:Whose book is it?B:It's() 1.my 2.mine 3.me -Whose book is this?-It must __ Mary.I saw her read it this morning.