完形填空（共15小题；每小题1分，满分15分）
阅读下列短文，从短文后各题所给的A、B、C、D四个选项中选出能填入空白处的最佳选项，并在答题卡上将该项涂黑。
A man was walking one day through a large city. On a street corner he saw a boy with a number of small birds for 31 , in a cage 笼子.
He looked 32 upon the little birds flying about the cage, beating the wires 金属丝with their wings, and trying to get 33 .
He stood for some time looking at the birds. 34 he said to the boy, "How much do you ask for your birds?"
“Fifty cents a piece, sir," said the boy. “I do not 35 how much a piece," said the man, “but how much for all of them? I want to 36 them all."he boy began to 37 , and found they came to five dollars. ”Here is your 38 ," said the man. The boy took it, well pleased with his morning's 39 .
As soon as the bargain 交易 was done, the man 40 the cage door, and let all the birds fly away.
The boy, in great 41 , cried, "What did you do that for, sir? You have 42 all your birds."
"I will tell you 43 I did it," said the man. "I was 44 three years in a French prison监狱, as a prisoner of war, and I've decided 45 to see anything in prison which I can make free.”
31. A. visit B. sale C. pleasure D. treatment
32. A. sadly B. happily C. coldly D. kindly
33. A. on B. off C. up D. out
34. A. At last B. Now and then
C. Just now D. At the same time
35. A. learn B. understand C. mean D. hear
36. A. feed B. eat C. catch D. buy
37. A. read B. count C. remember D. help
38. A. money B. bird C. cage D. wire
39. A. exercise B. lesson C. trade D. show
40. A. closed B. opened C. knocked at D. broke into
41. A. danger B. hope C. surprise D. excitement
42. A. lost B. killed C. sold D. kept
43. A. how B. why C. when D. where
44. A. looked after B. hidden away C. shut up D. shown around
45. A. always B. seldom C. sometimes D never