补全对话.英语
A:_____me,Mary.______these your pencils?B:_____,they are Helen's.A:And_____this her eraser?b:no,it___.It's Dale's.A:what____this ruler?B:It's Cindy's.And the pen is ____,too.A:And the dictionary?Is that yours?B:Yes,it's_____.A:Thank you_____your help,Mary.B:You're____.