本影片完整講稿Does he want a sandwich? Yes,he does. Does he want a sandwich? No,he doesn't. Does she want a sandwich? Yes,she does. Does she want a sandwich? No,she doesn't. Does he want a sandwich? Yes,he does. Does he want a sandwich? No,he doesn't. Does she want a sandwich? Yes,she does. Does she want a sandwich? No,she doesn't.