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Bill was a very good pilot(·ÉÐÐÔ±).He had been in the air force for several years, and had been very successful. Now he was sent to a small field in the middle of a forest, ¡¡36 ¡¡planes were able to attack the enemy very easily, ¡¡37 ¡¡it was near the front line, but ¡¡38 ¡¡to find. The forest tress were very tall and very ¡¡39 ¡¡on all sides, so planes had to go down very quickly and then stop their falling very ¡¡40 ¡¡before they ¡¡41 ¡¡on the ground. Only the ¡¡42 ¡¡pilots were able to land safely, and even some of those lost their planes and ¡¡43 ¡¡because they hit the trees on the ground.

After Bill had arrived, he was not ¡¡44 ¡¡until he was able to fly closer to the trees than any of ¡¡45 ¡¡pilots, and soon all the pilots who used that field were trying to ¡¡46 ¡¡each other at flying ¡¡47 ¡¡over forest. Every time one of their planes came back from the attack on the enemy, the other pilots used to run ¡¡48 ¡¡and watch, to see how near the trees ¡¡49 ¡¡pilot took it, if the succeeded in taking very near, they laughed and shouted.

Bill soon ¡¡50 ¡¡exactly how near he was able to go safely, and then one day he flew so close to the ¡¡51 ¡¡of the trees that some of the branches ¡¡52 ¡¡the bottom of his plane. The other men in the plane seemed rather ¡¡53 , but Bill only laughed as he landed the plane without any ¡¡54 ¡¡in the middle of the field ¡¡55 ¡¡the other pilots on the ground shouted happily. ¡±How silly I am!¡± he said. ¡±I forgot that the trees had grown since yesterday!¡±

36.A.from which¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.in which¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.on which¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.at which

37.A.for¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.when¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.where¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.so

38.A.difficult¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.easy¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.tough¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.strong

39.A.old¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.near¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.close¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.secret

40.A.slowly¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.suddenly¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.quickly¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.carefully

41.A.fell¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.struck¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.landed¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.hit

42.A.young¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.best¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.old¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.able

43.A.were killed¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.were wounded¡¡¡¡¡¡¡¡ C.were shot¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.were defeated

44.A.skilled¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.fit¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.trained¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.satisfied

45.A.other¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.the other¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.all the¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.others

46.A.help¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.understand¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.beat¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.see

47.A.low¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.high¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.up¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.fast

48.A.nearer¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.in¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.inside¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.outside

49.A.its¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.whose¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.their¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.a

50.A.found¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.thought¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.realized¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.learnt

51.A.nearest¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.branches¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.tops¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.leaves

52.A.touched¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.scratched¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.snatched¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.knocked

53.A.surprised¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.pleased¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.helpless¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.frightened

54.A.trouble¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.danger¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.stones¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.trees

55.A.so¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B.when¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C.while¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D.as

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