【文章內(nèi)容簡(jiǎn)介】 not discovered until 190In that year, a thirteenyearold boy named Ben Sands crawled through a small opening three hundred feet underground、He found himself in a large cave half filled with water、Today tourists visit the Lost Sea and ride far out onto it in glassbottomed boats powered by electric motors、More than thirteen acres of water have been mapped out so far and still no end to the lake has been found、Even though teams of divers have tried to explore the Lost Sea, the full extent of it is still unknown、6The Lost Sea is unique because it is ________、part of a historical cave systemthe biggest underground lake in the worldlisted in the Guinness Book of World Recordsthe largest body of water in Tennessee6The Craighead Caverns have been known ________、A、through history B、since the time of the Indian nationsC、since 1905 D、since divers explored them6Who located the Lost Sea in recent times?A、The Cherokee Indians、B、Tourists、C、Ben Sands、D、Scientists、6What was found in “The Council Room”?A、A small natural opening、B、A large cave、C、Another series of rooms、D、Many old Indian objects、70、It can be inferred from the passage that the Craighead Caverns presently serve as ____、A、an underground testing site B、an Indian meeting groundC、a tourist attraction D、a motor boat race coursePassage ThreeGenerations of Americans have been brought up to believe that a good breakfast is one life’s essentials、Eating breakfast at the start of the day, we have all been told, and told again, is as necessary as putting gasoline in the family car before starting a trip、But for many people the thought of food first thing in the morning is by no means a pleasure、So despite all the efforts, they still take no breakfast、Between 1977 and 1983, the latest year for which figures are available, the number of people who didn’t have breakfast, increased by 33 percent、For those who feel pain of guilt about not eating breakfast, however, there is some good news、Several studies in the last few years indicate that, for adults especially, there may be nothing wrong with omitting breakfast、“Going without breakfast does not affect performance,” said Arrold E、Bender, former professor of the nutrition at Queen Elizabeth College in London, “nor does giving people breakfast improve performance、”Scientific evidence linking breakfast to better health or better performance is surprisingly inadequate, and most of the recent work involves children, not adults, “The literature”, says one researcher, Dr、Erresto at the University of Texas, “is poor”、7The latest year for which figures could be obtained is _______、A、the year the author wrote the article B、1977C、any year between 1997 and 1983 D、19837For those who do not take breakfast, the good news is that _______、several studies have been done in the past few yearsthe omission of breakfast does no harm to one’s healthadults have especially made studies in this fieldeating little in the morning is good for health7“…nor does giving people breakfast improve performance” means ______、anyone without breakfast does improve his performancenot giving people breakfast improve performancehaving breakfast does not improve performance, eitherpeople having breakfast do improve their performance7The word “l(fā)iterature” in the last sentence refers to _______、A、stories, poems, plays, etc、B、written works on a particular subjectC、any printed material D、the modern literature of America7What is implied but NOT stated by the author is that _______、breakfast does not affect performanceDr、Erresto is engaged in research work at an institution of higher learningnot eating breakfast might affect the health of childrenProfessor Bender once taught college courses in nutrition in LondonPassage FourAbout 35% of all high school graduates in America continue their education in an institution of higher learning、The word college is used to refer to either a college or a university、These institutions offer fouryear programs that lead to a Bachelor of Arts(B、A、)or Bachelor Science(B、S、)degree、Some students attend a junior college(providing only a twoyear program)for one to two years before entering a fouryear college as a sophomore(二年級(jí)生)or junior(三年級(jí)生)、It is generally easier to be accepted at a state university than at a private one、Most private schools require strict entrance examinations and a high grade point average(GPA), as well as specific college prep classes in high school、Private schools cost considerably more than state colleges and famous private schools are very expensive、Poorer students can sometimes attend, however, by earning scholarships、Some college graduates go on to earn advanced masters or doctoral degrees in grad(graduate)school、Occupations in certain fields such as law or medicine require such advanced studies、Since college costs are very high, most students work at parttime jobs、Some have fulltime jobs and go to school parttime、Often some will take five or more years to plete a fouryear program because of money / job demands on their time、While the college and work demands take up the great part of a student’s time, most still enjoy social activities、Sports, dances, clubs, movies, and plays are all very popular、However, gathering together for long, philosophical talks at a favorite meeting place on or near the university is probably the most popular activity、7College education is _______ in America、A、quite mon B、very rareC、something difficult D、almost impossible7Which of the following is NOT required for entering most private schools、A、entrance examinations B、taking part in many activitiesC、GPA D、college prep classes7How can poor students attend private schools?A、Only by working at parttime jobs、B、Only by working at fulltime jobs、C、Only by earning scholarships、D、All of above、7The American college students like to _______ most of all、A、discuss problems on philosophy B、play ballsC、earn enough money D、go to the cinemas or theatres80、Th