1 . A new study explores the custom of tipping in the United States. Many Americans give tips to people who perform a job for them, especially workers in the service industry. They pay a little extra to people cutting their hair, driving them across town or serving them a meal at a restaurant.

The researchers found that men give bigger tips to restaurant workers than women. And people who live in the northern US are more generous with tips than those living in the South. People who earn $ 50, 000 or more a year give bigger tips than those who earn less than $50, 000. There is one likely reason: the wealthier Americans have more money to spend.

Michael Lynn is a professor of consumer behavior and marketing at the Cornell University School of Hotel Administration in New York. In other words, he knows a lot about the issue of tipping. In earlier surveys, Lynn said he found mixed results on the generosity of men and women when it comes to tipping. In some studies, men gave bigger tips than women. In others, women gave more money.

Lynn’s own research in American restaurants found that men give bigger tips when the restaurant server is a woman and women give more when the server is a man. Tips are very important to service employees. People who work at restaurants often get most of their earnings from tips.

Nationwide, Americans generally tip between 15 to 20 percent at restaurants and leave from $2 to S 10 a day for the people who clean their hotel rooms. Tips of 15 percent of the reading on the meter (计价器) are also common for people who drive taxis.

But here is something to keep in mind. If you are able to give the person serving you a tip or a bigger one than what is expected, your generosity will be welcome. Many service workers do not make much money, and even an extra dollar or two can make a difference in their lives.

1. What is paragraph I mainly about?

A．A study in a restaurant.	B．A job offering a lot of tips.
C．The service industry in the US.	D．The custom of tipping in the US.

2. What is Lynn’s finding in American restaurants?

A．People give more tips to the opposite sex server.

B．People are always more generous to service employers.

C．Men give the same tips to the women restaurant servers as women.

D．Men always give more tips to the men restaurant servers than women.

3. How much tips do Americans generally pay if the reading on the taximeter is $100?

A．$2.	B．$10.
C．$15.	D．$20.

4. What is the authors attitude towards tipping?

A．Doubtful.	B．Critical.
C．Uncaring.	D．Supportive.