任务型阅读 Frank is four years old. In the past, he was a special boy. He didn’t want to play with other children or say any words to others. His parents were worried about him. However, Billy, a cat, helped Frank get out of his world. When Billy saw Frank, it ran to him quickly. It sat on Frank’s legs. Now they look like two old friends. Billy likes to stay with Frank. They play together, listen to stories together and sleep together. When Frank walks in the garden, Billy always follows him. When Frank is sad, Billy always lies beside him. Billy is like Frank’s angel (天使