阅读理解。

     Mark Twain was an American writer. One day he went to a city by train. He wanted to see one of his

friends there. He was a very busy man. He usually forgot something.

     When he was in the train, the conductor asked him for his ticket. Mark Twain looked for his ticket here

and there, but he couldn't find it. The conductor knew Mark Twain. He said, "Show me your ticket on your

way back. And if you can't find it, it doesn't matter.

     "Oh, but it does," said Mark Twain, "I must find the ticket. If I can't, how can I know where I am going?"

1. Mark Twain was a _____.

A. teacher

B. farmer

C. writer

D. conductor

2. Mark Twain went to the city _____.

A. by train

B. by car

C. by air

D. by ship

3. Mark Twain went to the city _____.

A. to buy some books

B. to see his friend

C. to see his parents

D. to see a film

4. When he was in the train, the conductor asked him for _____.

A. some books

B. some food

C. some help

D. his ticket

5. Mark Twain didn't show his ticket because _____.

A. he didn't like the conductor

B. the conductor didn't ask for it

C. he couldn't find it

D. he didn't buy the ticket at all