6. a. informations b. knowledge c. background d. information
7. a. estimated b. count c. calculate d. estimate
8. a. oneb. two c. three d. four
9. a. questions b. answers c. solutions d. problems
10. a. limits b. end c. limit d. edge
参***：1. b 2. d 3. a 4. d
5. b compile 收集、编辑。
the police h**e compiled a list of suspects.
conduct 领导、控制。
6. d information 是不可数名词。
7. d 8. b
9. d question和problem的中文意思均为“问题”，但question指需要对方回答的问题。
10. a limit： 表示界限、界线时，常用复数。
end： 末端、尽头。 edge： 边缘。
二）there h**e been many great __1__.the first great invention was one that is still very important today——the wheel. this made it easier to carry __2__ things and to tr**el long distances.
in the early 1800s the world __3__ to change. there was little unknown land left in the world. people did not h**e to explore much any more.
they began to work instead to make life better.
in the second half of the 19th century many great inventions were made. among them were the camera， the electric light and the radio. these all became a big part __4__ our life today.
the first part of the 20th century saw more great inventions： the helicopter in 1909， movies with sound in 1926， the computer in 1928， and jet planes in 1930. this was also a time __5__ a new material was first made.
nylon came out in 1935. it changed the kind of clothes people wore.
the middle part of the 20th century brought new ways to help people __6__ disease. they worked very well. they made people healthier and let them live __7__ lives.
by the 1960's most people could expect to live to be at least 60.
by this time most people had a very good life. of course new inventions continued to be made. man began __8__ ways to go into space.
russia made the first step. then the united states took a step. since then other countries， including china and japan， h**e made their steps into space.
in 1969 man took his biggest step away from earth. americans first walked on the moon. this is certainly just a __9__ though.
new inventions will someday allow us to do things we h**e never yet __10__.
1. a. discoveries b. creations c. invention d. inventions
2. a. he**yb. light c. clumsy d. smart
3. a. begin b. open c. started d. start
4. a. in b. for c. to d. of
5. a. while b. when c. where d. at
6. a. over b. come c. get over d. get back
7. a. longer b. shorter c. long d. short
8. a. going by b. liking c. looking for d. studying
9. a. begin b. beginning c. began d. starting
10. a. dreamed b. dreaming c. to dream of d. dreamed of
参***：1. 选d 此题为逻辑思维题。
本题有easier， carry， 表明“携带┄┄更方便”，经过推理，he**y 最合适。clumsy （指工具、家具等）难用的，难移动的，设计欠佳的。
2. 选a 3. 选c be/become a part of sth.
4. 选d time在定语从句中做时间状语，这个定语从句所修饰的先行词是time
5. 选b while 和 when 的区别在于while常与进行时态的动词连用，when常与一般时态的动词连用。
6. 选c get over sth. 克服、战胜、掌握。
7. 选a go by （1） （时间）过去、消逝。
2 ） go by sth. 遵照或依照某事物。
8. 选c9. 选 starting的错误是因为 start本身是名词。
10. 选d dream of/about doing sth. 想象、幻想，或梦想某事物。
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