【正文】 onclude that the internet “is a dangerous place to do business”? C［A］ Because panies that sell online may be unreliable. ［B］ Because there are no controls on doing business on the internet. ［C］ Because doing business online is unpredictable. ［D］ Because even panies like eBay have problems doing business online. (ccaac)Section B [A] Twelve years ago, Lawler recalls, a member of the staff brought in an article about the decline in children39。s health: “We said, ‘We have these kids five days a week. We should be able to do something.’” At that time, Lawler and his staff had a basketball court, a playing fieldand a student body that dreaded the twiceyearly 1mile run to measure fitness. So they eliminated the semiannual curse, requiring instead that every student run every week. You wouldn39。t believe the line outside the nurse39。s office with kids and their medical excuses, says Lawler. But slowly the kids got over itand into it.[B] Just as attitudes about PE and fitness are shifting, however, even the most enlightened teachers are finding themselves obstructed in their efforts. More and more schools are cutting back or eliminating PE instruction entirely. Illinois is the only state in the nation that requires daily physical education for grades K12. But even in Illinois, schools can get waivers to replace PE with activities like band or choir. Only 8 percent of . elementary schools percent of middle schools, and percent of high schools provide daily physical education for the entire school year. A quarter of all school children don39。t get PE classes at all. Indeed, one study indicates that today39。s grandparents are more active than their grandchildrena fact almost certainly tied to the doubling of overweight children over the past 20 years.[C] The Naperville schools have fitness centers, plete with stationary bikes and a climbing wall, inline skates, heartrate monitors for every kid, andperhaps most importanta coaching staff with a shared epiphany about the links between childhood obesity and physical education.[D] But the real value may be in showing all children, including those without athletic talent, the value of fitness.[E] Wele to the new PE39。and not a minute too soon for any kid who has been picked last, Consigned to right field, or left dangling halfway up the climbing rope. The idea is to get away from the jock culturefastest, strongest, most athleticand instead start all kids on a road to lifelong fitness. And that starts with no humiliation. The Naperville, Ill., district, where Lawler teaches, has been highlighted in a governmentfunded book, Active Youth, as a model in promoting physical activity for children. [F] There39。s no doubt that schools are squeezed for time and money. Parents want electives like foreign languages and music as well as AP courses, which count heavily in college admissions. In addition, teachers are struggling to boost scores on national tests, all at a time when school districts are faced with tight budgets. Gym class often little more than dodge ball to begin withis typically the first subject to get the budget ax. Even recess, a poor substitute for true health education, can be pulled out of the day39。s mix. One California parent said teachers would count fieldtrip timewalking to a munity center, for exampleas part of required physical education time.[G] Even so, it wasn39。t until four years ago that Lawler realized he was pushing some kids too hard. It was the heart monitors that changed his thinking. It turns out the kids were already working at their maximum aerobic capacity, even many of the apparent slackers, but he couldn39。t determine that just by watching them. He39。d try to motivate them to work harder. After the monitors showed indisputably that they were working hard, he made several changes in the program, including switching from a mile run to a 13minute run. The kids now know that distance and speed don39。t matter. Whether they39。re walking, running, inline skating, playing soccer, or using the fitness center, what matters is that they39。re in motion long enough to keep their heat rate in the zonethe 145 to 166 beats per minute a 12yearold needs to give the heart a good workout. [E]→76.[ ]→77.[ ]→78.[ ]→79.[ ]→80.[ ]→[D] Section CIn the following article, some sentences have been removed. For Questions 4145 ,choose the most suitable one from the list AG to fit into each of the numbered blank. There are two extra choices ,which do not fit in any of the gaps .(10 points) Long before Man lived on the Earth , there were fishes ,reptiles, birds, insects, and some mammals. Although some of these animals were ancestors of kinds living today ,others are now extinct, that is, they have no descendants alive now . 81) . Very occasionally the rocks show impression of skin, so that, apart from color, we can build up a reasonably accurate picture of an animal that died millions of years ago. That kind of rock in which the remains are found tells us much about the nature of the original land ,often of the plants that grew on it, and even of its climate. 82) . Nearly all of the fossils that we know were preserved in rocks formed by water action, and most of these are of animals that lived in or near water. Thus it follows that there must be many kinds of mammals, birds, and insects of which we know noting. 83) . There were also crablike creatures, whose bodies were covered with a horny substance. The body segments each had two pairs of legs, one pair for walking on the sandy bottom ,the other for swimming. The head was a kind of shield with a pair of pound eyes, often with thousands of lenses. They were usually an inch or two long but some were 2 feet. 84) . Of these, the ammonites are very interesting and important .They have a shell posed of many chambers , each representing a temporary home of the animal .As the young grew larger i