英语完形填空Every year the U.S. receives tens of thousands of inve

英语完形填空
Every year the U.S. receives tens of thousands of inventions. 41 these only a few become 42 and make a lot of money. There are thousands of inventions that 43 wants. Here are some of those.
In 1879, somebody invented a new type of "fire escape". This was a hat which had a parachute on top. You connected the hat with a strap under your skin. With this 44 hat 45 you could 46 from a building on fire and flew safely down. With it there was also a special pair of shoes, so the person 47 safely.
There was a special alarm clock for people who had problems 48 in the morning. This clock had six pieces of wood that 49 above your head. At the 50 the pieces of wood dropped down on you when you were 51 . They hit you but did not 52 you. Therefore, you woke up.
Another invention was the bicycle seat to stop a thief. This seat had needles in it. When the owner 53 the bicycle the needles were 54 . But when the bicycle was not in use, the needles were up. So a thief who jumped on the bike got a nice 55 !
( ) 41. A. Of B. For C. To D. With
( ) 42. A. useful B. complete C. popular D. public
( ) 43. A. everybody B. somebody C. anybody D. nobody
( ) 44. A. ordinary B. special C. magical D. strong
( ) 45. A. on B. along C. outside D. below
( ) 46. A. jump B. watch C. explore D. practise
( ) 47. A. fell B. landed C. stood D. ran
( ) 48. A. getting up B. putting on clothes C. waking up D. going to sleep
( ) 49. A. stopped B. circled C. appeared D. hung
( ) 50. A. necessary place B. right time C. same time D. very beginning
( ) 51. A. dreaming B. awake C. lying D. sleeping
( ) 52. A. reach B. knock C. hurt D. cut
( ) 53. A. rode B. repaired C. locked D. owned
( ) 54. A. out B. down C. short D. low
( ) 55. A. chance B. danger C. surprise D. joke
帮忙看一下怎么做啦!谢谢!~~