阅读理解。 When I was ten, my mother worked all day so I had to take care of my younger brother. At that time my little brother was about four years old and he missed mum all the time. One day, after I had given him his dinner, he started crying for mum. He was so young and really needed mum. So I dressed him, put on his shoes, carried him on my back and walked out. Soon he fell asleep. About half an hour later, I found that he had lost a shoe while sleeping. I took him off my back and put him down. I knew we needed to find that shoe, for our mother couldn't afford new shoes. We had to go back to find it, so I told my brother to wait right there. A man heard it and stopped me just before I walked off. He asked me, 'You are leaving your brother here to find the shoe? What would you do if he is not here when you return?' I did not know how to answer that question. He continued, 'It's OK if you can't find the shoe, but it is not OK to lose your brother.' Then he sent us to mum's workplace by taxi. My whole life I have depended on the kindness of many strangers, I feel regretful that I cannot find them and say thank you. I do not even remember what the man's face looked like, but he taught me a lesson-people are more important than things. 1. Why did the younger brother cry for his mother? A. Because he was hungry. B. Because he missed his mother. C. Because he wanted to sleep. D. Because he wanted to play outside. 2. What does the underlined word 'regretful' in the last paragraph mean? A. Sorry. B. Happy. C. Excited. D. Angry. 3. What did the man mean by saying 'It's OK if you can't find the shoe, but it is not OK to lose your brother.'? A. People are more important than things. B. Things are more important than people. C. Both the shoe and your brother are important. D. The shoe is more important than your brother. 4. According to the passage, which word can best describe the man? A. Rude. B. Funny. C. Silly. D. Kind.