阅读理解。 One day a rich man met Sam. The rich man asked, 'I hear you are 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 (愚蠢的).' 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 one group of sheep and another group of sheep, how many groups of sheep do you have?' 'Why! That's an easy question. One and one is two, anybody knows it. I have two groups of sheep.' Sam laughed and said,' You are wrong. Two groups of sheep put together 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. a young man D. an old man 2. The rich man became angry because ______. A. Sam said he was clever. B. Sam said he was foolish. C. Sam was foolish. D. Sam wasn't clever 3. Sam asked the rich man ______ question. 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. cleverer D. poorer