阅读理解。 'Tipping' (给小费) 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. Do you invite your friend to the restaurant? Then you pay the bill. Does your friend invite you? Your friend pays. If there are men and women in the party, men usually pay. These days, men and women are equal in many ways. If you work in Britain or America, your boss could be a man or a woman. There are increasing numbers of women in important positions in politics, law, medicine and the business world. But it is still polite for men 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. 1. In this passage, the writer tells us _____. A. not to give any tip to others B. only to give tips to women C. only to give tips in restaurants D. to give tips to the right person 2. If you have had a meal with your friend in a restaurant, _____. A. you should pay the bill B. your friend should pay the bill C. the person who invites the other person should pay the bill D. you should ask your friend 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 have changed their conditions in many ways 4. It is impolite for a man to _____. A. open a door for a woman and to go first himself B. stand up when he is introduced to a woman C. stand beside a woman D. let a woman go first