结构推理 Directions: In this part there is a short passage with five questions or incomplete statements. Read the passage carefully. Then answer the questions or complete the statements in the fewest possible words (not exceeding 10 words). How do first-born children differ from later-born children? Hundreds of experiments have yielded evidence that the eldest child tends to be more dependent, more ambitious, and more anxious. He is more sensitive to pain. He avoids dangerous sports like football, soccer and rugby. First-borns are less likely to become alcoholics or delinquents. Although they are no more intelligent, they are better readers as children; they do better in high school; they do better on National Merit Scholarship tests and Scholastic Aptitude Tests. They predominate in colleges. In the Ivy League, first-borns account for up to 66 percent of the students. They dominate graduate schools and account for more than their fair share of physicians, lawyers, architects, college professors and astronauts. Proportionately more first-borns become famous and end up in Who's Who. One reason for differences between older and younger children is that parents treat them differently. Many parents, usually unconsciously, favor the eldest, if only because everything they do is a novelty. First-borns tend to be breast-fed longer. They are more likely to be given nicknames. And they are photographed endlessly, while later-borns are lucky to appear in group pictures. First-borns are also given more responsibility—if only because mother needs them to help with the younger ones. There is still a tradition among certain ethnic groups that the eldest should enjoy special educational advantages. Sometimes it's simply because families cannot afford to send more than one child to college—and first come, first serve. Many parents simply expect more of the first child. Dr. Harris points out that the first-born child "provides the first vehicle whereby parents can continue their own identities and realize their frustrated hopes and ambitions". All in all, it seems that first-borns are not only teachers' pets, but parents' pets as well. 1.The passage mainly deals with 2.Parents usually give more love to first-born children because 3.The reason why first-born children predominate in college may be 4.The three reasons why first-born children differ from younger children are 5.The author may think that first-borns accounts for more than their share of doctors.