新概念第一册Lesson11-12

•----shirtisthat?•----Isthisyourshirt,Dave?•----No,sir.notmyshirt.•----ismyshirt.Myshirt’s.•----Isthisshirt?•----Perhapsitis,sir.Tim’sshirtiswhite.•----Tim!•----Yes,sir?•----you.Catch!•----Thankyou,sir.