These shells are mine.(改为疑问句）_____ these shells ______?

These shells are mine.(改为疑问句）_____ these shells ______? shells 1.Could you please f__ your backpack with shells when you come back from Qingdao.2.These bikes are s__ made for disabled people. there are shells( ),( )on the beach怎么填 Are these shells是什么 Are these your trousers?Yes,these are, these are his shoes.( )are these ()? Are these your Are these your pencils? These bags are heavy. Are these pens ___? Are these shoes? These are my friend how much are these are these( )tickets? These are ()() my books. are these ( )(watch)yours?