Passage 3

　　The dog has always been considered man‟s best friend. Always noted for being particular faithful in watching over children, he also has his place by the fireside, in the cow pasture, on the sheep range, and beside the hunter or blind. He is easy to train, works hard, and often performs astonishing feats. And in the frozen polar regions, he was once the principal motive power, before being largely replaced by the plane and helicopter.

　　Because he howls or whines in the presence of impending death, the dog was once thought to have supernatural powers and believed to be capable of seeing gods and ghosts in visible to people. Actually, the basis for these beliefs lies in the dog‟s sensitivity to people‟s feelings and his superior hearing ability and sense of smell, which enable him to detect signs hidden from human observation. His record of saving lives is outstanding, for he often gives warning of fire and other dangers not noticed by his master.

　　The dog‟s major contribution, however, has been to medical research. Both his diet and his structure are comparable to those of the human being, and so he has been the subject, of countless demonstrations and experiments. Open-heart surgery has been made possible largely because of the dog. But his sacrifice has repaid his own species as well by safeguarding it from rabies(狂犬病), distemper, and other diseases.

　　43. The dog has always been noted for _____.

　　A. protecting children B. assisting shepherds

　　C. helping hunters D. herding a cattle

　　44. The dog is useful to herders because he is _____.

　　A. loyal B. easily trained C. hard working D. all of the above

　　45. The dog probably whines in the presence of death because he can _____.

　　A. see ghosts and spirits B. give warning of ganger

　　C. sense unhappiness around him D. perform astonishing feats

　　46. The dog has been of most valuable to people in the development of _____.

　　A. a treatment of rabies B. open-heart surgery

　　C. a cure for distemper D. all of the above

　　47. The article does not say whether the scientists‟ experiments with dog have _____. A. benefited animals other than dogs B. served people

　　C. helped other dogs D. contributed to medical knowledge

　　Passage 4

　　Almost every family buys at least one copy of a newspaper every day. Some people subscribe to as many as two or three different newspapers. But why do people read newspapers?

　　Five hundred years ago. news of important happenings — battles lost and won, kings or rulers overthrown or killed — took months and even years to travel from one country to another. The news passed by word of mouth and was never accurate. Today we can read in our newspapers of important events that occur in faraway countries on the same day they happen.

　　Apart from supplying news from all over the world, newspapers give us a lot of other useful information. There are weather reports, radio, television and Film guides, book reviews, stories, and, of course, advertisements. There are all sorts of advertisements. The bigger ones are put in by large companies to bring attention to their products. They pay the newspapers thousands of dollars for their advertising space, but it is worth the money, for news of their products goes into almost every home in the country. For those who produce newspapers, advertisements are also important. Money earned from advertisements makes it possible for them to sell their newspapers at a low price and still make a profit.

　　48. The habit of reading newspapers is _____.

　　A. widespread B. found among a few families

　　C. not popular D. uncommon

　　49. In the past, news was _____.

　　A. sent by telegraph B. sent by letter

　　C. passed from one person to another D. sent by telephone

　　50. The money spent on advertisements is _____.

　　A. wasted B. not much C. worthwhile D. of no use to anyone

　　51. Which of the following statements is not true?

　　A. Five hundred years ago news did not take a long time to reach other countries. B. Large companies put big advertisements in the newspapers to make their products known.

　　C. The news that we need in our newspapers is up-to-date.

　　D. Though the newspapers are sold at a low price, their owners still gain profit.

　　52. The phrase "subscribe to" in the second sentence means _____.

　　A. contribute to B. write to

　　C. pay for receiving D. appreciate