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1、(31) Ballpoint pens have made life easier for millions of people. At one time schools did not like their students to write with pen. Perhaps it was 16 _ pens can leak and it is easy to spill the ink. And 17 _ is hard to write on thin or cheap paper with them.,16. 根据前后句的因果关系可知填because引导原因从句。 17. 作形式主
2、语替代后面的不定式。,because,it,Ladislao Biro 18 _(work) for a newspaper in Budapest. He spent all day at his desk. Day in and day out, he corrected pages of thin, cheap paper 19 _ a pen and ink. He often had to stop to fill his pen and it did not write 20 _(good) on the thin paper.,18. 由上下文可知用一般过去时。 19. 介词wi
3、th这里意为“用”。 20. 副词作状语, 修饰write。,worked,with,well,He and his brother George began some experiments. They wanted a pen 21 _ _ did not leak, with ink that did not spill. Why not use a little ball 22 _the end? Two Englishmen, Henry Martin and Frederick Miles, liked 23 _ idea.,21. 引导定语从句修饰前面的pen。 22. 根据搭配
4、, at the end“在末端”。 23. 指代上文提到的想法。,at,the,It was the time of the Second World War. The Air Force needed a non-leak, non-spill pen for the men 24 _(write) with on planes. Martin and Miles made 25 _sold many thousands of Biro “writing-sticks” to the Air Force.,24. 不定式作补语。 25. 前后动词为先后关系, 故填and。,to write
5、,and,(32) Suppose you are going to Boston, and you have never visited the city before. If someone tells you about the interesting places in the city, you begin to get some ideas 16 _what you will see. But dont have 17 _clear idea of where these places are or of how to find them.,16. 因idea 后接of说明idea
6、的内容。 17. 不定冠词表示“一个”。,of,a,However, 18 _ someone has a map of the city and shows you the main roads and buildings, you may say, “Oh, now I see. I can find my way with no trouble at all.” 19 _ (work) at math is somewhat like trying to find your way to a new city.,18. 根据前后句的条件关系可知填if引导条件从句。 19. 动名词作主语。
7、,if,Working,Perhaps the words may tell you some 20 _(inform) and you have thought it over, 21 _ you cant see any clear road to the answers. Maybe 22 _need to have a kind of map of the main roads in maths to help you find your way.,20. 名词作宾语。 21. 前后为转折关系, 故填but。 22. 根据句中的to help you可知。,information,bu
8、t,you,Explore what lies 23 _ maths, and try your best to find the main roads. They 24 _ (lead) you to the answer. If you can find the “map”, the maths problems will 25 _(work) out easily.,23. 介词in此处意为“在里面”。 24. 由上下文可知用一般将来时。 25. 由主语可知用被动语态。,in,will lead,be worked,(33) The computer plays an important
9、 part in our everyday life. It is one of the great 16 _(invent) in the world in the twentieth century. It works for us not only at home, in offices, in big shops, but also at schools. Today it is used 17 _many ways. It really brings the world large wealth 18 _ happiness.,16. 名词作表语, 根据句中的one of可知用复数。
10、 17. 根据后面的ways可知填in。 18. 前后为并列关系, 故填and。,inventions,in,and,19 _first computer in the world 20 _ (call) Enid. It was built in America in 1946. It was large and heavy. Since it was born, it 21 _(develop) very fast. Until now it has gone through four periods and changed a lot.,19. 定冠词的基本用法, 序数词前用the表顺序
11、。 20. 由主语可知用被动。 21. 根据前面的since短语可知。,The,was called,has been developing,Therere many kinds of computers. Computers are getting smaller and smaller and computing faster and faster. So 22 _are becoming more and more helpful. The computer can do most of the things for people.,22. 指代前面的computers。,they,It
12、 can help us 23 _(know) about the real world more quickly, to learn 24 _ we want to learn and to think for ourselves. 25 _a student in the twenty-first century, you must work hard at it.,23. 不定式作us的补语, 后面并列的不定式有to,所以这里也不省略to。,to know,what,As,24. 引导宾语从句, 作从句的宾语。 25. 介词as此处意为“作为”。,(34) The computer is
13、 fast, and never makes a mistake, while people are too slow, and full of mistakes sometimes. Thats 16 _ people often say when they talk about computers. For over a quarter of a century, scientists 17 _ (make) better and better computers.,16. 引导表语从句, 作从句的宾语。 17. 根据句首的时间状语可知用完成进行时态。,what,have been mak
14、ing,Now a computer can do a lot of everyday jobs wonderfully. 18 _is widely used in factories, hospitals, post offices and airports. A computer can report, decide and control in almost every field. Many computer scientists are thinking of making the computer “think” like a man. 19 _ the help of a pe
15、rson, a computer can draw pictures, write music, talk with people, play chess, recognize voices, translate languages and so on.,18. 指代前面的a computer。 19. 固定搭配, with the help of“在的帮助下”。,With,It,Perhaps computers will one day 20 _ (real) think and feel. Do you think the people will be afraid 21 _ they
16、find that the computer is too clever 22 _ (listen) to and serve the people?,20. 副词作状语修饰动词think 和 feel。 21. 根据前后句的时间关系可知填when引导时间从句。,really,when,to listen,22. 固定搭配, too.to do“太而不能”。,No, people will make 23 _ (good) use of the computers in the future. Man is always 24 _master of the computer. The computer works only
