阅读理解。 One day a rich man met Sam. The rich man asked,'I hear you're very clever and nothing is difficult to you. Can you tell me why you are so clever?' Sam answered with a smile,'Oh, I am not clever. Instead, you are too foolish.' The rich man became very angry. Sam said,'Please don't be angry. If you don't believe me,now let me ask you a question. If you put together one group of sheep,how many groups of sheep do you have?' 'Why! That's an easy question. One and one is two, anybody knows that. I have two groups of sheep.' Sam laughed and said,'you are wrong. When two groups of sheep is put together, there is still one group. That's the easiest question in the world.' 1. One day met Sam. [     ] A. a rich man B. a poor man C. an old man 2. The rich man became angry because . [     ] A. Sam was foolish B. Sam said he was foolish C. Sam was Clever D. Sam wasn't Clever 3. Sam asked the rich man questions. [     ] A. an easy B. a difficult C. an interesting D. a good 4. Two groups of sheep put together is . [     ] A. one group B. two groups C. many groups D. many sheep 5. Sam is than the rich man. [     ] A. more foolish B. richer C. more clever D. more rich