this is (Lily) book Lily 用加's

用this is lily's skirt中的lily's提问 < >book is mine,and< >are Lily's book's.A this,those B This, I t___ this bag is Lily's. hers后面可以加be动词吗?比如This cup is not Lily's.Hers is This bike is Lily"s,This bike isLucy"s.They are Lily and Luc Lily is look __her book 请把“Lily`s book is red"改为一般疑问句. The desk is Lucy and Lily's.{Lucy and Lily's画线} —— is this? He is Lily's uncle 【改成否定句】 ls this her book [改为复数】 the is yo This room is ___ .A.Lucy and Lily B.Lucy's and Lily C.Lucy's This bike is Lily"s.That bike isLucy"s.They are Lily and Luc This pair of shoes is Lily's.(Lily's划线部分提问)