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　　Passage 15

　　There have 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 travel long distances.

　　In the early 1800s the world __3__ to change. There was little unknown land left in the world. People did not have 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， have 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 have never yet __10__.

　　1. A. discoveries B. creations C. invention D. inventions

　　1. 选D

　　2. A. heavy B. light C. clumsy D. smart

　　此题为逻辑思维题。本题有easier， carry， 表明“携带┄┄更方便”，经过推理，heavy 合适。

　　clumsy （指工具、家具等）难用的，难移动的，设计欠佳的。

　　eg. It's not easy walking in these clumsy shoes.

　　穿着这双笨重的鞋走路真难受。

　　2. 选A

　　3. A. begin B. open C. started D. start

　　3. 选C

　　be/become a part of sth.

　　4. A. in B. for C. to D. of

　　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. A. while B. when C. where D. at

　　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。

　　eg. He fell asleep while （he was） doing his homework.

　　I always remember the time when we spent in New York last year.

　　5. 选B

　　6. A. over B. come C. get over D. get back

　　get over sth. 克服、战胜、掌握

　　6. 选C

　　7. A. longer B. shorter C. long D. short

　　go by （1） （时间）过去、消逝eg. The weeks went slowly by. 一星期一星期慢慢过去了。

　　（2 ） go by sth. 遵照或依照某事物eg. That's a good rule to go by.那是要遵守的好规则。

　　7. 选A

　　8. A. going by B. liking C. looking for D. studying

　　8. 选C

　　9. A. begin B. beginning C. began D. starting

　　starting的错误是因为 start本身是名词。

　　例如：We won't finish the job today but we'll have made a good start.这工作我们今天是做不完的，但可以开个好头。

　　9. 选

　　10. A. dreamed B. dreaming C. to dream of D. dreamed of

　　dream of/about doing sth. 想象、幻想，或梦想某事物。

　　eg. He dreams of one day becoming a famous violinist.

　　他梦想有朝一日成为著名的小提琴家。

　　10. 选D

　　涉及到上下文的有2道，涉及到语法的有3道