从方框中的A~G选项中选择适当的句子将对话补充完整,每项限用一次

从方框中的A~G选项中选择适当的句子将对话补充完整,每项限用一次
A：Hi,John.() B:No,it isn,t.It,s my grandfather,s A:()B:It,s here.Come and see.A:Oh,your room is not tidy.Where,s your chair?B()A:Where,s your schoolbag?() B：Oh,it,s in my quilt.A:（） B：I can,t find it I think I lost it 选择区：A.Where,s your room?B.Is this your room?C.It isn,t on the table.D.Are they on the E.It,s under the tableF.I found it in the classrom.G.Where,s your baseball