問題詳情

For thousands of years, people have wanted to fly. The idea was especially interesting to twoFrench brothers, Jacques and Joseph Montgolfier. In the late 1700s, they 34 experimentingwith hot-air balloons.Their first experiment was to fill small paper bags with smoke. They found that the bags35 rise in the air. At first, the two brothers believed that the smoke made the bags rise. Butlater, they realized it was the hot air, 36 the smoke, that caused the bags to rise.The Montgolfier brothers continued to experiment. In 1783, they put a hot-air balloon in the airfor eight minutes. The balloon carried a rooster, a sheep, and a duck! They came back to earth safelyafter history’s first real balloon flight. Later that year, they made a bigger balloon and the two peoplerose over 300 feet 37 the air. Their flight lasted 25 minutes.By 1784, ballooning had become very popular in France. People traveled for miles 38balloons take off and come down again. One year later, two men flew from France 39 theEnglish Channel to England. It took two hours.Today, hot-air balloons are very popular. To fly a balloon, the pilot burns wood or gas to makehot air, which makes the balloon rise. The balloon rises into the air as more hot air 40 . Tolower the balloon, hot air is released.
34.
(A) made
(B) wanted
(C) created
(D) began

參考答案

答案：D
難度：適中0.444444
統計：A(2),B(0),C(3),D(4),E(0)

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