Liberia，the oldest independent Negro state in West Africa，has been struggling for survival ever since its foundation in 1822．Progress has been hampered by constant hostility between the AmericanNegroes whose families returned there in the early 19th century，and the West Africans whose ancestors never left the continent．Though the two groups are of the same race，they are divided by language and outlook and regard each other with deep suspicion creating a conflict which was not foreseen by Liberia’s founders．In addition，neighboring states，native tribe，disease，and poverty have made life dangerous and difficult．The government has tried desperately，through loans and a trickle of trade，to make ends meet．Anxiety about financial matters lessened somewhat when，in l910，the United States accepted responsibility for Liberia’s survival．However，not until Harvey Firestone，the American rubber king，decided that the United States must produce its own rubber--with Liberia as the site of the rubber plantations-did Liberia have much hope of paying its debts and balancing its budget．The rubber industry，founded in the l 920s，and the activity that followed it brought both progress and profit to Liberia．Before that time Liberia had DO roads，no mechanical transport and no good port；its people had little education and few tools．Liberians feel that the country is being ruled by rubber．For this reason，the recent discovery of iron ore is important．Liberian leaders are trying to moderate the power of the rubber industry and to establish the country’s political and economic independence．The country’s finance began to improve a bit in__________．
A.1822B.1910C.1920D.1920s

More and more，the operations of our businesses，governments，and financial institutions are controlled by information that exists only inside computer memories．Anyone clever enough to modify this information for his own purposes can reap big reward．Even worse，a number of people who have done this and been caught at it have managed to get away without punishment．It’s easy for computer crimes to go undetected if no one checks up on what the computer is doing．But even if the crime is detected，the criminal may walk away not only unpunished but with a glowing recommendation from his former employers．Of course，we have no statistics on crimes that go undetected．But it's disturbing to note how many of the crimes we do know about were detected by accident，not by systematic inspections or other security procedures．The computer criminals who have been caught may have been the victims of uncommonly bad luck．Unlike other lawbreakers，who must leave the country，commit suicide，or go to jail，computer criminals sometimes escape punishment，demanding not only that they not be charged but that they be given good recommendations and perhaps other benefits．All too often，their demands have been met．WhyBecause company executives are afraid of the bad publicity that would result if the public found out that their computer had been misused．They hesitate at the thought of a criminal boasting in open court of how he juggled the most confidential records right under the noses of the company’s executives，accountants，and security staff．And so another computer criminal departs with just the recommendations he needs to continue his crimes elsewhere．It is implied in the third paragraph that_______．
A.most computer criminals who are caught blame their bad luckB.the rapid increase of computer crimes is a troublesome problemC.most computer criminals are smart enough to cover up their crimesD.many more computer crimes go undetected than that are discovered

When teaching grammar．“You are a stranger in this town．”and“A policeman was asking some questions．”are two examples of using_________．
A.mimesB.gesturesC.chain of eventsD.created situations

Which can be the while-listening activity in the following activities
A.The teacher gives some background knowledge about the listening text．B.The students sequence the sentences or paragraphs based on the listening text．C.The students are asked to predict the language features of the listening text．D.Act out a role-play between people involved in the listening text．

Liberia，the oldest independent Negro state in West Africa，has been struggling for survival ever since its foundation in 1822．Progress has been hampered by constant hostility between the AmericanNegroes whose families returned there in the early 19th century，and the West Africans whose ancestors never left the continent．Though the two groups are of the same race，they are divided by language and outlook and regard each other with deep suspicion creating a conflict which was not foreseen by Liberia’s founders．In addition，neighboring states，native tribe，disease，and poverty have made life dangerous and difficult．The government has tried desperately，through loans and a trickle of trade，to make ends meet．Anxiety about financial matters lessened somewhat when，in l910，the United States accepted responsibility for Liberia’s survival．However，not until Harvey Firestone，the American rubber king，decided that the United States must produce its own rubber--with Liberia as the site of the rubber plantations-did Liberia have much hope of paying its debts and balancing its budget．The rubber industry，founded in the l 920s，and the activity that followed it brought both progress and profit to Liberia．Before that time Liberia had DO roads，no mechanical transport and no good port；its people had little education and few tools．Liberians feel that the country is being ruled by rubber．For this reason，the recent discovery of iron ore is important．Liberian leaders are trying to moderate the power of the rubber industry and to establish the country’s political and economic independence．The government has tried desperately，through loans and a trickle of ffade，to make ends meet．“To make ends meet”means__________．
A.the government has to borrow money from othersB.the government has to lend money to othersC.the government doesn’t have to borrow or lend moneyD.the government has either to borrow or to lend money

Usually，society is far more dedicated to noting evidence in favor of superstition than it is to __________contrary evidence．
A.observeB.observingC.observedD.observation