Good manners and etiquette(礼仪)are not complicated. Anyone can【D1】______ courtesy and consideration for others—the stuff of which

Good manners and etiquette(礼仪)are not complicated. Anyone can(21)demonstrate courtesy and consideration for others—the stuff of which good manners are made—without knowing the rules of etiquette. No one is born knowing these rules. They are learned(22)gradually at home, in school, at work, and in everyday contact with both friends and strangers. To expand their knowledge of(23)good conduct many people continue to read etiquette books as adults.
    There are a number of reasons why people want to learn good manners and the rules of etiquette. Good manners help win friends. Naturally people who treat other people with(24)kindness and sympathy are most likely to become popular because they are considered(25)good companions. Good manners also help please members of the family, special friends, teachers,(26)employers, and strangers, salespeople and law officers. Good manners help put people at ease, make them cooperative and just(27)plain happy.
    People who practice good manners and understand the rules of etiquette also make themselves happy. Knowing how to(28)behave properly, in familiar as well as in strange situations, builds(29)self-confidence. Meeting new people and visiting new places become pleasurable instead of(30)frightening experiences.