what are these keys (

what are these keys ( What _____ these keys?Are these yours? whose keys are these?they are y什么 keys. —What are these?—Oh,a set keys .They're mine. 英文题- what ()these keys?Are they yours?- no,they aren`t.They Are these your keys?做否定回答 These are keys?是疑问句吗 These are my keys.改成一般疑问句 these are your keys 改为单数句 what are these ? These are ( )? These are her keys的同义句：These keys are（ ）. what are these ones?