22 - When people began to try to create a "flying machine" in the eighteenth century. they used hot air balloons. These balloons went up into the air but then could not be controlled. They went wherever the wind was blowing. The idea of a real nying machine remained a dream for a long time. That dream finally came true in 1903, when Wilbur and Orville wright a.
invented a new kind of engine.
c. made their first successful flight in an airplane
d. . flew across the Atlantic Ocean.
d invented the hot-air balloon.