根据下面内容，回答题：

　　Banks are not ordinarily prepared to pay out all accounts; they rely on depositors( 剪刀 )not todemand payment all at the same time. If depositors should come to fear that a bank is not safe, that itcannot pay off all its depositors, then that fear might cause all the depositors to appear on the sameday. If they did, the bank could not pay all accounts. However, if they did not all appear at once, thenthere would always be enough money to pay those who wanted their money when they wanted it. Mrs.Elsie Vaught has told us of a terrifying bank run that she experienced. One day in December of 1925several banks failed to open in a city where Mrs. Vaught lived. The other banks expected a run thenext day, and so the officers of the bank in which Mrs. Vanght worked as a teller had enough moneyon hand to pay off their depositors. The officers simply told the tellers to pay on demand. The nextmorning a crowd gathered in the bank and on the sidewalk outside. The length of the line made manythink that the bank cohld not possibly pay off everyone. People began to push and then to fight for places near the tellers' windows. The power of the panic atmosphere was such that two tellers, thoughthey knew that the bank was quite all right and could pay all depositors, drew their own money fromthe bank. Mrs. Vaught says that she had difficulty keeping herself from doing the same.

　　40A bank run happens when __________ .

　　A.a bank is closed for one or more daysB.too many depositors try to draw out their money at one timeC.there is not enough money to pay all its depositors at one timeD.tellers of a bank take their own money from the bank

　　参考答案：B

　　参考解析：

　　文中第五句中“a terrifying bank run”的意思是“可怕的银行挤兑”，而本题的题干是问银行挤兑是在什么情况下发生，根据文章的解释，可知答案为B项。

　　41The main cause of a bank run is__________ .

　　A.loss of confidenceB.lack of moneyC.crowds of peopleD.inexperienced tellers

　　参考答案：B

　　参考解析：

　　本题的题干是问“发生银行挤兑的主要原因”就是许多人都认为银行拿不出钱来，即资金缺乏。

　　42Which of the following did Mrs. Vaught say?

　　A.She knew that the bank was not sound.B.She feared that too many depositors drawing their money would close the bank.C.She was not able to draw out her money.D.She was tempted to draw out her money.

　　参考答案：D

　　参考解析：

　　文章最后一句话告诉我们，“Mrs.Vaught觉得很难控制自己不去将自己的钱取出来”，因为当时的气氛非常恐慌，所以D项正确。

　　43According to the passage, the actions of the depositors of Mrs. Vaught's bank were affect-ed mainly by the __________ .

　　A.ease with which they could get their moneyB.confidence that Mrs. Vaught showedC.failure of several other banks to openD.confidence shown by other depositors of the bank

　　参考答案：C

　　参考解析：

　　由文章可知“一些银行没有开门”，所以这就是为什么许多人跑到开门的银行去取钱。

　　根据下面内容，回答题：

　　Copernicus was born in Torun, Poland, on February 19,1473. Little is known about his early lifeexcept that his father died when he was 10. An uncle adopted him, his two sisters, and his brother.The uncle saw to it that the two boys received a good education. Copernicus went to the University ofCracow. There he studied such subjects as Latin, mathematics, and astronomy. It was probably at thattime that he changed his Polish name, Niklas Kopperuigk, to the Latin form of Nicolaus Copernicus.In 1496 Copernicus went to Italy,where he spent the next 10 years studying at various universities.In Copernicus' time people still believed that all things--the sun, the stars, and the planetsmoved around the earth. It was an old belief that few men had ever questioned. Aristotle had basedhis theory of astronomy on this belief. Because the Church had long been the center of learning, thetheory was also linked to religious beliefs.

　　In 1506 Copernicus returned to his homeland. A few years later he began to work for the Church.All those years Copernicus carried on his work in astronomy. He had just the most basic equipmentand, like other scientists of his day, made observations with only his eyes. Still, using mathematics andlogic ,Copernicus worked out a different theory,which held that the planets went around the sun.

　　Copernicus did not announce his ideas. He did not want to make trouble. But he could not hidethe scientific truth. So he talked about his theory with his friends, who strongly advised him to have his work published. His great book, On the Revolutions of the Heavenly Bodies, appeared at the veryend of his life. Copernicus saw the first copy on the day he died, May 24,1543.

　　44From the passage we can see that astronomy is __________ .

　　A.the life experience of great menB.the movement of the stars and the planets ,C.the scientific study of natural objects in spaceD.the theories developed by scientists of old times

　　参考答案：C

　　参考解析：

　　从哥白尼学的是天文学(astron.omy)，研究的是太空中的太阳、地球等可知，astronomy就是对太空中天体的研究。

　　45Copernicus developed his theory __________ .

　　A.using various telescopesB.based on Aristotle's beliefsC.through observations and reasoningD.under the encouragement of his friends

　　参考答案：C

　　参考解析：

　　根据文章中第三段最后两句可知，哥白尼是通过眼睛观察以及数学和逻辑的方法来进行研究的。

　　46The writer of the passage wants us to know that__________ .

　　A.Copernicus did not tell about his discovery until the day of his deathB.for many years Copernicus dared to do nothing openly against the ChurchC.pushed by his friends Copernicus decided to write a book in May 1543D.shortly before he got back to Poland Copernicus started to work for the Church

　　参考答案：B

　　参考解析：

　　根据文中第四段第一句可知，哥白尼起初没有将他的发现公布于世。

　　47Copernicus had his great book published because __________ .

　　A.he didn't agree with AristotleB.he could not hide the scientific truthC.he worked for the ChurchD.his friends advised him to do so

　　参考答案：D

　　参考解析：

　　文章第四段第四句表明，哥白尼在朋友的建议下出了书。