单项选择题

The author thinks that

A．tipping can benefit greatly a country's economic growth.
B．tipping can ensure the quality of service a customer receives.
C．tipping can improve a country's cultural environment.
D．tipping is not conductive tertiary industry.

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单项选择题

People who dine in a New York restaurant

A．are not expected to give any tip to the waiter or waitress.
B．had better tip more than 15% so as not to be shamed.
C．may be looked down upon when offering a considerable tip.
D．are thought of as generous if they tip 15%.

单项选择题

We can get the information from the article that

A．tipping is very popular in European countries.
B．in Asian countries tipping never existed.
C．tipping is more popular in America than in Europe.
D．tipping is popular in America because the Americans are much richer.