四、翻译(英译汉)
51.The historian Frederick J. Tuner wrote in the 1890's that the agrarian(农民)discontent(不满)that had been developing steadily in the United States since about 1870 had been precipitated(加速)by the closing of the internal frontier-that is, the depletion(枯竭)of available new land needed for further expansion of the American farming system.
答案：历史学家Frederick J Tuner在19世纪90年代写道：自1870年以来美国农民的不满一直在缓慢增长，直到1870年关闭了内部前沿以后就被加速了——就是说，用于扩张农业系统的新土地资源已经枯竭了。
五、写作
52.Directions：For this part.You are to write 100～120 words.You have to write your composition based on the outline given below in Chinese below
请以“成功之道”为话题作文
答案： ①In such a competitive society，everyone has a strong desire to be successful in his life.
②How to achieve success ?In my opinion，there are three main keys—a clear objective，
strong willpower and diligence.
③It is very important to set up a goal before you start.No one can be sucdessful without agoal in his mind.
④You need a strong willpower to keep you go ahead.There always are tough stones in every road to success.Whether you can go through it depends on whether you aye per-sistent enough.
⑤everyone who wants to succeed should be diligent.There is an old saying，“No pains，no gains.”
⑥Most successful people owe their success to hard working，such as Einstein.
⑦In conclusion，if we want to be shccessful，we have to master these three keys.There is no shortcut to success.
⑧These three keys will assure you to realize your wonderful dreams.
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