OrvilleandWilburWrightwerethetwoAmericanbrothersthatinv...

问题详情：

Orville and Wilbur Wright were the two American brothers that invented the first airplane. They started out as bicycle repairmen. Soon, they became interested in different types of machines and began to learn    41    the machines worked. They observed birds flying   42    (get) ideas, as well as read about other inventors’ attempts to make aircraft. In 1900, the brothers completed their first design of a kite glider(滑翔机) and tested    43    in North Carolina. They tested kite gliders both with and without    44    pilot.      Finally, in 1903, the first engine-powered Wright Flyer    45    (invent). The “Wright Flyer I” had a gas engine and wooden propellers(螺旋桨). After they continuously improved it upon    46     (early) designs, the brothers successfully received a patent in 1906 for their Flying Machine.      Modern airplanes today are very different    47    the first Flying Machine. They fly faster and offer greater    48    (safe). And in order to ensure passengers’ enjoyment and comfort, modern airplanes are much better equipped, with television sets    49    (build) in. Some planes have seats    50    can be adjusted to become beds and on the very newest planes, passengers can even use the Internet!

【回答】

56. a      57. are destroyed   58. freedom      59. truly   60. standing

61. who / that       62. more likely      63. Either   64. in   65. yours

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