A farmer had some puppies（小狗）to 36 . He painted a sign advertising the puppies and 37__ nailing （钉）it to a post on the edge of his yard. As he was driving the last nail into the post, a little boy came to him.
“Mister,” he said, “I want to buy one of your puppies.”
“Well,” said the farmer, as he 38 the sweat off his face, “these puppies come from fine parents and cost 39 money. Do you have enough money?”
The boy 40 his head for a moment. Then reaching into his pocket, he pulled out a handful of 41 and held it up to the farmer. “I’ve got thirty-nine cents. Is that enough to take a look?” “Sure,” said the farmer. And with that he 42 a whistle (口哨声), “Here, Dolly!” he called. 43 from the doghouse and down the ramp ran Dolly 44 by four little balls of fur. The little boy’ eyes danced with delight. As the dogs made their 45 to the fence, the little boy noticed something else stirring inside the doghouse. 46 another little ball appeared; this one noticeably smaller. Then in a somewhat 47 manner the little pup began hobbling（蹒跚） toward the others, doing its best to 48 .
“I want that one,” the little boy said, 49 to the smallest one. The farmer said, “Son, you don’t want that puppy. He will never be able to run and play with you 50 these other dogs would.”
With that the little boy 51 back from the fence, and began 52 up one leg of his trousers. In doing so he exposed a steel support running down both sides of his leg 53 itself to a specially made 54 . Looking back up at the farmer, he said, “You see sir, I don't 55 too well myself, and he will need someone who understands.”
36．A. sell B. buy C. raise D. drive
37. A. set off B. set out C. set about D. set up
38. A. wiped B. removed C. settled D. drove
39. A. a number of B. quite a few C. a great deal of D. only a little
40. A. raised B. buried C. dropped D. shook
41. A. change B. price C. treasure D. wallet
42. A. made out B. put away C. gave away D. let out
43. A. In B. Away C. Out D. Up
44. A. equipped B. protected C. attacked D. followed
45. A. way B. direction C. path D. struggle
46. A. Rapidly B. Slowly C. Suddenly D. Simply
47. A. curious B. foolish C. ordinary D. active
48. A. catch up B. keep up C. put up D. make up
49. A. staring B. pointing C. greeting D. devoting
50. A. while B. as C. that D. what
51. A. stepped B. escaped C. went D. kept
52. A. pushing B. forcing C. rolling D. tearing
53. A. attaching B.attached C. being attached D.to attach
54. A. leg B. stick C. shoe D. foot
55. A. walk B. run C. live D. go