Edison often said, “1 will discover what the world needs, then I will try to invent it.”  It is true that he did more than any other man of his time in inventing things. He made more than one thousand inventions in his life and all these have changed our way of living. Edison was one of the greatest inventors in the world. When Edison died in 1931, someone said people should turn off all the lights in their homes, streets and factories for several minutes in honour of this great man. Of course it was impossible to do so. And this shows what Edison's inventions mean to people's life.

1.All the things Edision invented were _________ people needed at that time.

A. what    B. that      C. then       D. which

2.Edison _________in inventing new things.

A. took all his time         B. paid all his money

C. spent his most time       D. spent his most money

3.Edison had _________ inventions in all his life.

A. thousands of               B. over one thousand

C. only one thousand           D. less than a thousand

4. Edison was dead for nearly _______ years.

A. fifty           B. severity-six     C. sixty     D. eighty

5.It was __________ to turn off all the lights in honour of the greatest inventor.

 A. possible    B. not true     C. nice     D. important

Edison often said, “1 will discover what the world needs, then I will try to invent it.”  It is true that he did more than any other man of his time in inventing things. He made more than one thousand inventions in his life and all these have changed our way of living. Edison was one of the greatest inventors in the world. When Edison died in 1931, someone said people should turn off all the lights in their homes, streets and factories for several minutes in honor of this great man. Of course it was impossible to do so. And this shows what Edison's inventions mean to people's life.

1.All the things Edison invented were _________ people needed at that time.

2.Edison _________in inventing new things.

3.Edison had _________ inventions in all his life.

4.Edison was dead for nearly _______ years.

5.It was __________ to turn off all the lights in honor of the greatest inventor.

The bicycle is one of the __41__ yet most useful inventions in the world. The surprising thing is that it was not __42__ earlier, although the great inventor Leonardo Da Vinci  (达芬奇)  had drawn pictures for bicycles and also for flying machines and some __43__ things. Those things were not produced __44__ long after he died.

A person riding a bicycle uses __45__ energy (能源) to make the bicycle move, and there is no pollution at all when you are riding. Even so, in developed __46__ , most people don't travel or work by bicycle. It's because   __47__ cars on the roads is larger and larger. It certainly becomes __48__ to ride a bicycle. As a result, more people put their bicycles away and go to work __49__ their cars. Perhaps the best way to make riding safer and more popular is to build roads only for __50__, and to make it difficult and expensive for drivers to drive their cars into the city.

41. A. simple         B. simpler            C. simplest           D. more simple

42. A. invent          B. inventing           C. invention           D. invented

43. A. other           B. another            C. others             D. the other

44. A. until           B. when             C. since              D. after

45. A. much           B. no                C. quite a lot of       D. very little

46. A. world          B. countries          C. land               D. villages

47. A. the number of   B. a number of        C. this kind of        D. many kinds of

48. A. safer            B. more dangerous    C. much dangerous    D. more wonderful

49. A. by             B. use               C. in                 D. riding

50. A. buses           B. cars               C. trains              D. bicycles