Who's book are these on the desk?(改错）

Who's book are these on the desk?(改错） These are their -(book) who's lunch box are these? They are ours.改错 Are ( )Kate's ( A.this,book B.that,book C.these,books D.those,book who are these? who are these stars. who's boots are these?的错句 these are book and ruler 里面里的book和ruler 需要加s吗 Whoes _____(book) are these Who bag is that?Whose is that girl?This book is mine book.These clothes are her. -----____school bags are these?-----They are Tom's and Mary's.A.Whom B.WhoseC.Who Who's books are these?they are Tom's这句话错在哪里 ___books are these?They are Mr Green's A.What B.Who's C.Whose These are Alice's grandparents.（Alice's grandparents划线提问）who are they? ( )forks are these?A,who B,what C,whose D,who‘s -Who are these white birds?-They are Mr Green's.这句话哪里错了 < >book is mine,and< >are Lily's book's.A this,those B This,that C These those D Those these Who's trousers are these?They're jim's哪错了?