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.”

A．sell B．buy C．raise D．drive

A．set off B．set out C．set about D．set up

A．wiped B．removed C．settled D．drove

A．a number of B．quite a few C．a great deal of D．only a little

A．raised B．buried C．dropped D．shook

A．change B．price C．treasure D．wallet

A．made out B．put away C．gave away D．let out

A．In B．Away C．Out D．Up

A．equipped B．protected C．attacked D．followed

A．way B．direction C．path D．struggle

A．Rapidly B．Slowly C．Suddenly D．Simply

A．curious B．foolish C．ordinary D．active

A．catch up B．keep up C．put up D．make up

A．staring B．pointing C．greeting D．devoting

A．while B．as C．that D．what

A．stepped B．escaped C．went D．kept

A．pushing B．forcing C．rolling D．tearing

A．attaching B．attached C．being attached D．to attach

A．leg B．stick C．shoe D．foot

A．walk B．run C．live D．go