听下面一篇短文，短文后有5个小题，从题中所给的A、B、C三个选项中选出最佳选项。 1. Where did the dog stay one day? [     ] A. At the gate. B. On the grass. C. In the school. 2. What happened to the children? [     ] A. They were ill. B. Their house was on fire. C. Their dog ran away. 3. Why was the dog worried? [     ] A. He couldn't see the children. B. Many people were in the street. C. The firemen were busy working. 4. Who took the dog to the children? [     ] A. A friend. B. A neighbor. C. A fireman. 5. What kind of dog was it according to the story? [     ] A. Ugly. B. Helpful. C. Strong.