D Advertising gives useful information about which products to buy. But modern advertising does more than gives news about products and services. Today’s advertisements, or ads, try to get consumers to buy certain brands(品牌) . Writers of advertising are so skillful they can sometimes persuade a consumer to wear a certain kind of clothing,eat a special kind of cereal, or see a movie. Consumers might never even want a product if they did not see or hear advertisements for it. For example, you probably do not need the newest cereal in the supermarket. There are probably many cereal brands on your kitchen helves. You may not have extra-tasty and has a free prize in the box, you may want it. Advertising must get attention. To be effective, it must be exciting, entertaining, or provide some pleasure. The secret of writing good advertising copy is to offer a good idea as well as a product. The idea is what the ad is really selling. One example is an ad that says eating a certain cereal will make a person do well in sports. That cereal brand may sell better if consumers think it offers strength and energy. 68. What is discussed in this passage? A. The content of modem advertising.     B. The skills of modern advertising. C. The results of modem advertising.      D. The writing of modern advertising. 69. According to the passage, a good advertisement should_______. A. be both persuasive and effective      B. give people useful information C. show people a product              D. show people a new idea of a product 70. From the passage, we know that ____ A. modem advertising has less effect on customers. B. once customers see ads about a new cereal, they are sure to buy it. C. cereal can make people strong. D. cereal is a kind of food which is popular among people.