【文章內(nèi)容簡介】 rica that the English first settled, and both colonies soon began to develop towards the west. However, this westward movement took place more because the English were searching for better land than because the population was increasing. Settlements of the western part of both countries developed quickly after gold was discovered in America in 1849, two years later in Australia.Although the development of these two countries has a lot in mon, there are some striking differences as well. The United States gained its independence from England by revolution while Australia won its independence without having to go to war. Australia, unlike the United States, was firstly turned into a colony by English prisoners and its economic development was in wheat growing and sheep raising. By 1922, for example, Australia had fifteen times more sheep than it had people, or almost half as many sheep as there are people today in the United States. Yet, in spite of these and other main differences, Australia and the United States have more in mon with each other than either one has with most of the rest of the world.40. Who turned Australia into a colony? A. Britain B. Several European countries C. The United States D. None of the above the early history of America and Australia, both colonies developed towards the west firstly for the reason that ________ ?A. the population was increasing rapidly in the eastB. the English thought there might be richer land thereC. gold was discovered thereD. fewer people lived there 42. In the early 1920s, ________ .A. Australia had one fifteenth as many people as sheepB. There were more than sheep in Australia than in the United StatesC. The population in Australia was greater than that of the United StatesD. The United States had twice as many sheep as people 43. The last sentence in the last paragraph “…Australia and the United States have more in mon with each other than either of the rest of the world.” Means _______ A. the United States and Australia do not have any main differencesB. the United Stated and Australia have much in mon than they have with other countriesC. the United States and Australia have nothing in mon with the rest of the worldD. in mon with the rest of the world, the United States and Australia have a lot of differences C How Long Can People Live? She took up skating at age 85, made her first movie appearance at age 114, and held a concert in the neighborhood on her 121st birthday. When it es to long life, Jeanne Calment is the world39。s recordholder. She lived to the ripe old age of 122. So is 122 the upper limit to the human life span(壽命)? If scientists e up with some sort of pill or diet that would slow aging, could we possibly make it to 150or beyond? Researchers don39。t entirely agree on the answers. Calment lived to 122, so it wouldn39。t surprise me if someone alive today reaches 130 or 135, says Jerry Shay at the University of Texas. Steve Austad at the University of Texas agrees. People can live much longer than we think, he says. Experts used to say that humans couldn39。t live past 110. When Calment blew past that age, they raised the number to 120. So why can39。t we go higher? The trouble with guessing how old people can live to be is that it39。s all just guessing. Anyone can make up a number, says Rich Miller at the University of Michigan. Usually the scientist who picks the highest number gets his name in Time magazine. Won39。t new antiaging techniques keep us alive for centuries? Any cure, says Miller, for aging would probably keep most of us kicking until about 120. Researchers are working on treatments that lengthen the life span of mice by 50 percent at most. So, if the average human life span is about 80 years, says Miller, “adding another 50 percent would get you to 120.” So what can we conclude