Yesterday Tom had no works to do after lunch. So his father asked him go to the bookstore to buy a few books. He walks to the bus stop and arrived there at three. When he was waiting on bus, he saw a little dog. It was going cross the street. Just then a car comes, driving fast. He wanted to save the dog. So it was too late. The dog fell down and doesn't move. "Poor dog!" he cried. But look! Suddenly he stood up and went away. He was very glad find that it was safe.