单项选择题

One day a farmer bought four donkeys at the market place in the village. He got (56) the back of one of (57) and began to ride home.
(58) he was riding along, he noticed that (59) were only three donkeys walking (60) him.
He expected to see four. "I (61) what happened, "he said to himself, "I bought four and paid (62) four donkeys, but now it appears that I have only (63) ".He was forgetting, of course, to (64) the donkey he was riding.
When he got home, his wife met him in front of their house. "I see you bought (65) fine donkeys," she said," (66) you buy them for a good price"
"Yes, I did," he said. "but (67) puzzles (使惊奇) me. I bought four donkeys at the place (68) morning. And I am sure that I had all four with me when I left the village. But now it seems that I have (69) three. See" He even counted them. "One, two, three."
He still didn’t (70) that he climbed onto one of the donkeys in the village and was sitting on its back at that (71) moment. (72) first his wife stared (73) him; waiting for him to (74) , for she thought he was joking. Then when she noticed that he was not, she turned away and laughed." (75) strange, "she said, "You see only three donkeys and I see five.\