“Tipping” (小费) is always a difficult business. You do not want to give too much or too little, or tip the wrong person. In Britain and America, people usually tip waiters in restaurants, porters, taxi drivers and hairdressers. They do not tip people in offices, cinemas, garages, or airports. These days, men and women are equal in many ways. If you work in Britain or America, your boss could be a man or woman. These are increasing numbers of women in important positions in politics, law, medicine and in the business world. But it is still polite for a man to open doors for women and to ask them to go first. And it is polite for men to stand up when they are introduced to women. On informal (非正式的) occasions (场合), of course, everyone is more relaxed. 1. In this passage, the writer tells us . A. not to give any tip to other B. only to give tip to women C. only give tip to old men D. to give tip to the right person 2. If you have had a meal with your friends in a restaurant, . A. you should pay the bill B. your friend should pay the bill C. the person who orders the meal should pay the bill D. you should ask your friends to pay the bill 3. Today in Britain and America . A. women are quite equal to men B. men hold all the important positions in politics C. women hold all the important positions in business D. women had changed their conditions in many ways 4. It is polite for a man to . A. sit beside women B. let women go first C. stand beside a lady D. drink for a lady 5. On informal occasions people are . A. more relaxed B. very nervous C. impolite D. kind