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1、Unit 41. add 加 A 加 Bsubtract 减 B 减 Amultiply 乘 A 乘 Bdivide 除 A 除以 B2. v. 计算n. 计算，计算题n. 计算器adj. 计算的3. v. 发明n. 发明家n. 发明，发明物4. v. 发展,开发n. 发展adj. 发达的adj. 发展中的 China is a developing country.5. a. 电子的 _mails 电子邮件a. 与电有关的 _ appliances 电器 a. 电的，用电驱动的 _lights/fans/iron 电灯/ 电扇/ 电熨斗_ n. 电，电力，电学6. _ v. 使惊讶_ adj
2、.令人吃惊的surprising_ adj. （感到）吃惊的_ n.惊奇 7. 写数字的不同方法 _8. 一个特别重要的数字 _9. 至少 _10. 数字这一国际语言 _11. 在古时候 _12. 用许多不同的方法 _13. 以同样的方式 _14. 十进制 _15. 数字系统 _16. 1-9 的数字 _17. 用这十个数字 _18. 从最大的到最小的 _19. 印度人 _ 20. 一项重要的发明 _21. 使得人们书写大的数字和计算更为容易 _22. 计算工具 _23. 如此以致 _24. 现代化的电子计算器 _25. 计算百分数和平方根 _26. 转瞬间，立即 _27. 做一道计算题 _2
3、8. 在你一生中 _29. 一台活的电脑 _30. 人脑 _31. 下面的故事 _-32. 给出答案 _33. 一位有拥有非凡头脑的印度女士 _34. 闪电般的 _ 35. 用指令为它编程 _36. 解决上面的问题 _37. 足够强大 _38. 做某事花某人多少时间： 1)_=2)_=3)_-某人花买某物1)_2)_ 3)_ 4)_Unit 4班级_ 姓名 _ 学号 _ 成绩 _I. Choose the best answer. (40%)( ) 1 . Please subtract five _nine. A. from B. with C. inD. by ( ) 2. Michael
4、 is not _ to take part in the 1,000metre race. A. strong enough B. enough strong C. so strong D. strong so( ) 3. A:I didnt enjoy the art festival. B: _.A. Neither did I B. Neither didnt I C. So didnt I D. Me too( ) 4. We _ three hours getting to Hangzhou by train.A. take B. takes C. spent D. spends(
5、 ) 5. How much does this film ticket _？A. cost B. take C. spend D. pay( ) 6. The Indians first _ and developed the system of the numbers.A. discovered B. developed C. invented D. calculated( ) 7. How much _ 4 multiplied by 12 ?A. are B. will be C. isD am( ) 8. Hurry up. There is _ time left. A. a fe
6、w B. few C. any D. little( ) 9. The teacher asked us to write _ 60 words about the topic.A. at least B. at the least C. in least D. in the least( ) 10. The invention of numbers made _ easier for us to calculate.A. it B. that C. this D. /( ) 11. Some people say he is the greatest _ writer. A. alive B
7、. living C. liveD. lives( ) 12. All the numbers are counted _.A. in ten B. in tens C. by tens D. with tens( ) 13. Is a human brain a _ calculator than a computer?A. more powerful B. powerful C. most powerful D. the most powerful( ) 14. The old man spent _ of his lifetime in painting. A. three-four B
8、. three-fourth C. three-fourths D. third-fourths( ) 15. We can solve the problem _ the same way.A. in B. with C. onD. of( ) 16. I lost _dollars on that bad investment! A. two thousand B. thousands of C. two thousand of D. thousand( ) 17. The number zero was an important _. A. invent B. discover C. i
9、nvention D. discovery( ) 18. “ 106=4” can be read as “ _”.A. Ten subtract six is four. B. Ten minus six is four.C. Ten minus six equals to four. D. Ten subtract six equals four.( ) 19. Do you know the lady _ India?A. from B. to C.forD. with( ) 20. The book is _ written for beginners.A. especially B.
10、 specially C. international D. strangelyII. Fill in the blanks with the given words in their proper forms. (10%)1.She is an _（India）lady with an _（amaze） brain. 2.Edison is one of the famous _（invent）.3.Everyone knows at _ two languages. ( little)4.In a flash, a computer can do a _ that you could no
11、t do in your whole lifetime. ( calculate )5. A modern _ calculator can add, subtract, multiply and divide. ( electric)III. Fill in the blanks (10%). 1. The Indians invented and _ ( develop ) the system of numbers.2.Betty isnt here. She _ to Germany. ( go )3.Father asks me _ ( finish ) my homework first. 4.You should try to answer the question _（accurate ）5.Please _ me. ( follow)IV. Rewrite
