单项选择题
A.Isthisyoursuitcase？ B.Isthisyourseat？ C.Isthisyourmoney？ D.Isthisyourbaggage？
A.Closethedoor，please. B.Closethewindow，please. C.Closethesuitcase，please D.Closethetrunk，please
A.MayIopenthedoor？ B.MayIopenthesuitcase？ C.MayIopenthetrunk？ D.MayIopenthewindow？