Jimmy lived in the country, and he loved playing in a very shallow river near his house; but then his father got a job in a big city, and he moved there with his family.Their new house had a garden, but the garden was very small. Jimmy wasn't very happy. " Is there a river near here? " he asked his mother on the first morning. His mother answered, " No, there isn't, but there's a beautiful park near here, Jimmy, and there's a pool in it. We'll go there this afternoon. " Then Jimmy was happy.After lunch, Jimmy and his mother went to the park. Jimmy wanted to walk near the pool, but there was a sign in front of it. His mother read it to him: " WARNING: this pool is dangerous. 367 people have fallen into it. " Jimmy looked into the pool carefully. Then he said, " I can't see them. "