【正文】 。見第三段第二句的前半句：來自工人階級家庭的學生接受大學教育并且某種職業(yè)的情況已十分普遍。 5. B細節(jié)題。D沒有提到。上流社會人數(shù)很少，后半是錯的，媒體還在關(guān)注他們，注意一定要看清楚再選。 4. C細節(jié)題。甚至像“先生”這樣的詞，除了在特定的職業(yè)中（如商業(yè)、軍隊）外，也不太常用，因為它聽起來太過謙卑。意為“因為它聽起來太過謙卑，很可能會引起尷尬”。所以正確答案應該是 C。意為“口音”。所以正確答案應該是 D。意為“那些比較富裕的生意人或有一定的職業(yè)的人”。而“階層”的最大區(qū)別是他們的口音。4.As regards social conventions, we must say a word about the wellknown English class system. 『This is an embarrassing subject for English people, and one they tend to be ashamed of, though during the present century classconsciousness has grown less and less, and the class system less rigid.』① But it still exists below the surface. Broadly speaking, it means there are two classes, the “middle class” and the “working class”. (We shall ignore for a moment the old “upper class”, including the hereditary aristocracy, since it is extremely small in numbers。根據(jù)上下文可知，作者認為實現(xiàn)太空旅行還很遙遠，而有人卻已經(jīng)開始制定規(guī)劃了，作者的話語中（that galaxy far， far away）含有諷刺意味，所以B正確。A（計劃的最大困難是生命維持系統(tǒng)問題），B（開發(fā)此市場的企業(yè)家們有足夠的資金），D（首次航行在幾年內(nèi)就可實現(xiàn)），均與原文不符，故排除。4. C 推斷題。3. C 細節(jié)題。A（賣面包和黃油的生意），B（生產(chǎn)面包和黃油的生意），C（謀生生意），D（旅游中介）四個選項中，C最符合題意。2. C 語義題。通讀全文可知，文章討論的是太空旅游業(yè)的可行性，所以A正確。t be too prepared for a trip to that galaxy far, far away.For those who are intent on joining the 100mile high club, Hilton and Budget are plotting to build space hotels. Before the Russian space Mir came down, some people were talking about using it as a lowrent space motel to reduce the cost. If a space hotel is finally built in space, and if you39。s prototype looks like a plane that has sprouted rocket engines. Rotary Rocket in Redwood City, California, has a booster with rotors make a helicopterstyle return to Earth。t include the cost of insuring rich and possibly litigious passenger. John Pike of the Federation of American Scientists acerbically suggests that the entire group of entrepreneurs trying to corner the spacetourism market have between them just enough money to blow up one rocket. The . space agency has plenty of money but zero interest in making space less expensive for the little guys. So the little guys are racing to do what the government has failed to do: design a reusable launch system that39。3.When Mike Kelly first set out to build his own private spaceferry service, he figured his breadandbutter business would be lofting satellites into highEarth orbit. Now he thinks he may have figured wrong. People were always asking me when they could go, says Kelly, who runs Kelly Space amp?！　?. (B)要點結(jié)論歸納。本題指向第三、四兩段關(guān)于電視連續(xù)劇影響人口出生率的要點：電視劇中把上層階級行為模式和價值觀包裝得十分誘人，傳遞到巴西的各個地方，影響著各個階層的生活方式。由上下文確定put it down to 中的it 指上文巴西成功降低人口增長率的事實，句中to 后接的是導致這一事實的兩大原因(電視劇和分期付款計劃)，前后顯然是一種因果關(guān)系。兩句都考(試^*大暗示這些國家做得不如巴西成功。短文中兩處提到Third World countries: ①第一段第二句 “countries such as India”。　　1. (A)主題句理解。第二段列舉人口增長率下降的數(shù)據(jù)。2.Brazil has bee one of the developing world’s great successes at reducing population growthbut more by accident that design. While countries such as India have made joint efforts to reduce birth rates, Brazil has had better result without really trying, says George Martine at Harvard.　　Brazil’s population growth rate has dropped from ％ a year between 1951 and 1960 to ％ a year between 1981 and 1990, and Brazilian women