单选题 Once there was an old farmer, with a horse which was almost as old as himself. He set out one morning with his son to sell the horse before it died. Father and son walked, because the farmer did not want the horse to be too tired.
They met two men on the road. The two men said, "Why are you walking, farmer? You have a horse. It's a long way to the market." The farmer knew that was true, so he rode on the horse, while his son walked.
Then they met two ladies. "What are you doing up there, farmer? Can't you see how tired your boy is?" So the farmer got down, and his son rode instead.
Next, three old men stopped them. One of them said, "Why are you walking, farmer? Get up. It's too hot for an old man like you to walk today." So the farmer got up behind his son on the horse, and they rode on.
Some time later, they saw a young woman. "Why aren't you walking?" she asked. "It isn't far to the market. Give your poor old horse a rest." So the farmer and son got down once again.

单选题 They took the horse to the market to ______.

单选题 At first ______ because the farmer did not want the horse to be too tired.

单选题 Who told the farmer to let his son ride on the horse?

单选题 Which of the following is wrong?
A. Both father and son rode on the horse to the market.
B．Farther rode the horse a while．
C．Son rode the horse a while．

单选题 Their home was ______ the market．