Greatinventionschangethewaywelive,Thefirstgreatinventio...

問題詳情：

Great inventions change the way we live ,The first great invention was one that is still very important today—the wheel. This made _ 61  easy for men to carry heavy things and to travel long distances. For  _62 （century）after that, there were few inventions that had as much effect as the wheel. Then in the early 1800’s,the world started to change_ 63   (great) the second half of the 19th century ,many great inventions _ 64  (make)g them were the camera, the electric light and the radio, all of _ 65 _ have become a big part of our life today. The first part of the 20th century saw many great inventions, _ 66_  (include) the helicopter ,movies with sound and the computer was also _ 67 _ time when a new world was made. Men began looking for ways to go into space. Russia and the US made the first step, _ 68_  (follow) by Europe and Japan a has also made great contributions to __69__   (explore) outer space these years, but we still have a long way to go.

New inventions are being made all the time. Who __70_ (know) what the world will be like in the future?

【回答】

61  it   62 centuries  63 greatly    64 were made  65 which 66  including   67 a      68 followed     69 exploring      70 knows 

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