| 阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。 From Mr Ward Hoffman． Sir I was halfway through Professor Raj Persaud's article “What's the tipping point”(Financial Times Weekend April 9-10)when it occurred to me that What I was reading was not ironic（讽刺的）．If Prof Persaud wants to know why Americans tip in restaurants he need only ask the first American he meets in London． Americans tip in restaurants for one reason and one reason only：we tip to supplement（补贴）the salary of restaurant workers．Quality of service does not enter into it beyond the fact that one may tip a bit less for poor service or a little more for good service． Not tipping at all in a non-fast-food restaurant is not a choice．In the US one used to tip about 15 per cent for dining in a family-style restaurant or in an upmarket（高档的）restaurant．Here in San Francisco Bay area restaurants we are encouraged to tip 20 per cent or more to help restaurant workers live in this very expensive area． After eating at an Italian restaurant in my city I left a tip of 20 per cent on the non-tax part of our dinner bill．It was expected．There is nothing more complicated（复杂的）than that about Americans tipping in restaurants． Ward Hoffman Palo Alto CA94306 US From Mr Philip McBride Johnson． Sir I algree with most of Raj Persaud's opinions aboutthe doubtful value of tipping but with one exception（例外）．Tips can be very useful when one is a repeat customer or diner． It is only when the tipper is a stranger and likely to remain so that the system does not work to his or her advantage．But frequent a hotel or a restaurant always tip a bit more and the difference in service and treatment will be easily felt． Philip McBride Johnson Great Falls VA22066 US |