Whose knife is on the floor?Please pick it up."whose"换成"Who'

Whose knife is on the floor?Please pick it up."whose"换成"Who' Look at __eraser on the floor.Whose is it? the ticket is on the floor.whold you please (pick)it up for Here is something on the floor.Please pick( )up.这里填 it 还是 th Whose is the book on the floor? look at the paper on the floor,please pick it up 还是 pick the Whose that book on the floor is?It ---mine.Mine is on the de Whose books are these on the floor?Please ( ) ,Jim. Please pick up the _______. Don’t keep it on the floor. A. b Please pick up the _______.Don’t keep it on the floor.A.wate Don't drop ____ on the floor.Please pick it up.A water B pap There is_ on the floor.please pick it up 用不定代词或不