26. The Missing Tip Chen is in America. His American friend， Daisy， suggested having lunch with him at a restaurant. C： Why’s that waiter so angry？ D： Those people who just left didn’t seem to give him any tip， which made him angry. C： Is that absolutely necessary here？ D： Kind of. It’s the custom. You can’t really avoid leaving at least a small tip. C： But suppose the service is bad？ D： In that case， of course， we don’t leave one. C： And does the waiter know that’s why you didn’t give him a tip？ D： Exactly. It’s just like telling him off. C： No wonder he’s so angry. D： Well， in fact， the people did leave him a tip， but that kid over there took it.