Those exercise books __ ours,____中应填什么be动词

Those exercise books __ ours,____中应填什么be动词 Those books are ours.(改为单数） Those two books ( )mine用be 动词怎么写 These books are yours.(用ours改为选择疑问句）___ these books yours __ 1.are these books ours?用our改写 2.those are their footballs.用t the books on the shelf are ours.those on the floor are _____ Here ____(be) your books --When shall we hand in the exercise-books?--____sooner,____ 1（c）these cups are ours.those are ____ a.others b.other's c. Please show ____ your books.A we B our C us D ours be动词可以与those缩写吗 改错：These are ours books