完形填空

　Man has always wanted to fly．Some of the greatest men in ___1___ have thought about the problem．One of ___2___, for example, was the great Italian artist, Leonardo Vinci (達(dá)·芬奇)．In the sixteenth century he made ___3___ for machines that would fly．___4___ they were never built．Throughout history, other less famous men have wanted to ___5___．An example was a man in England 800 years ago．He made a pair of ___6___ of chicken feathers．Then he ___7___ them to his body and jumped into the ___8___ from a tall building．He did not fly very far．___9___, he fell to the ground and broke every ___10___ in his body．

　The first real steps took place in France, in 1783．Two brothers, the Montgolfiers, ___11___ a very large“hot air balloon”．They knew that ___12___ air rises．Why not fill it with it? The balloon was made ___13___ cloth and paper．In September of that year, the King and Queen of France came to ___14___ the balloon．They watched it carry the very first air ___15___ into the sky．The passengers were a sheep and a chicken．We do not know ___16___ they felt about the trip．But we ___17___ know that trip lasted eight minutes and that the animals ___18___ safely．Two months later, two men did the ___19___ thing．They rose above Paris in a balloon of the same kind．Their trip ___20___ twent-five minutes and they travelled about eight kilometers．

　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　

(1) A．history	B．America
C．Russia	D．world	[　　]
(2) A．which	B．men
C．whom	D．these	[　　]
(3) A．plans	B．designs
C．parts	D．tools	[　　]
(4) A．Or	B．Then
C．Soon	D．But	[　　]
(5) A．run	B．build
C．fly	D．do	[　　]
(6) A．wings	B．fans
C．machines	D．planes	[　　]
(7) A．added	B．fixed
C．put	D．brought	[　　]
(8) A．water	B．sea
C．air	D．field	[　　]
(9) A．While	B．Instead
C．Though	D．So	[　　]
(10)A．arm	B．leg
C．wing	D．bone	[　　]
(11)A．found	B．made
C．bought	D．discovered	[　　]
(12)A．cold	B．thin
C．thick	D．hot	[　　]
(13)A．in	B．out
C．of	D．from	[　　]
(14)A．see	B．fly
C．drive	D．visit	[　　]
(15)A．flight	B．men
C．passengers	D．scientists	[　　]
(16)A．what	B．how
C．whether	D．if	[　　]
(17)A．will	B．should
C．must	D．do	[　　]
(18)A．landed	B．lived
C．slept	D．played	[　　]
(19)A．easy	B．different
C．same	D．other	[　　]
(20)A．ended	B．lasted
C．spent	D．travelled	[　　]