题目

Long ago there was a poor farmer called Fred. Fred and his wife Doris lived __61_(happy) together in their small old house. One winter night, the Luck Fairy visited __62__.   “Fred, you’re a good farmer. I’d like to give you a wish,” said the Luck Fairy.   “A wish?” said Fred. Fred and Doris smiled __63  each other. Then Fred said, “Thank you, Luck Fairy. We’re very healthy and happy.”    “You work very hard _64 _ you make very little money. Would you like some gold coins?” asked the Luck Fairy.    “We’re poor, but we have enough food __65__(eat).” re已知其中为常数，若，则=（  ）A．2B．-6C．-10D．-4