请听下面一段材料,回答第1-4题。 1. What do we know about “latchkey children”? A. They don't like to go to school. B. They are very slow in study. C. They suffer problems from being left alone. 2. What is not allowed according to the school rule? A. Carrying keys. B. Wearing jewelry. C. Wearing jeans. 3. How do the children feel when they are at home by themselves? A. Fearful. B. Lonely. C. Annoyed. 4. Which of the following is TRUE according to the talk? A. Latchkey children try to hide their feelings. B. Latchkey children often watch TV with their pets. C. Most parents don't know the latchkey children's feelings.