Two strangers were sitting together in a plane . They were on a long journey . One of the men was a teacher . The other was a farmer .
They sat without talking for a while , then the farmer said , “ Let’s do something to pass the time .”
“ What do you want to do ?” the teacher asked .
“ We can ask each other riddles (谜语 ),” the farmer said, “ You start.”
“ Let’s make the rules first ,” the teacher said . “ And to make the game more interesting , let’s play it for money . If we don’t know the answer to the riddle , we have to pay a dollar .”
The farmer thought about this for a while , then he said , “ That’s not fair（公平 . You are a teacher , an educated ( 受过教育的) man . You know more things than I do . I am just a farmer .”
“ That’s true ,” the teacher said , “ What do you think we should do ?”
The farmer said , “ If you don’t know the answer to a riddle ,you pay me 100 dollars .If I don’t know the answer to the riddle , I’ll pay you 50 dollars.”
The teacher thought for a while , then he said , “ OK. That’s fair . Who’ll go first ?”
“I will ,” the farmer said . “ Here’s my riddle . What has three legs when it walks , but only two legs when it flies ?”
The teacher thought and thought , “ What has three legs when it walks, but only two when it flies ?” Then he said , “ That’s a good one . I don’t know the answer .” He gave the farmer 100 dollars and said , “ Tell me the answer . What is it ?”
“ I don’t know , either .” The farmer said , and gave him 50 dollars .
At first the two men sat there without talking because ________ .

A．the farmer didn’t like the teacher	B．the teacher didn’t like the farmer
C．the farmer liked to tell jokes	D．they didn’t know each other

The farmer wanted to __________ .

A．make the journey interesting .	B．see if the teacher was lucky
C．know if the teacher was clever .	D．make friends with the teacher .

The teacher thought at first that the farmer __________ .

A．would fail the game	B．knew more then he.
C．could answer any riddles .	D．would win the game .

From the short story we know that __________ .

A．the teacher was cleverer than the farmer .

B．an educated man is not always clever.

C．both of the two men could know the answer

D．Neither of the two men was clever.

The best title of this story is __________ .

A．How to Answer Riddles .	B．A Rich Teacher.
C．A Way of Getting Money.	D．A Clever Farmer.