Переделайте в косвенную речь
"Good morning," said Stuart.
"Hello," answered Snowball dryly. "You're up early, aren't you?"
Stuart looked at his watch. "Yes," he said, "it's only five minutes past six, but I want to do some exercises."
"Haven't you done all your exercises in the bathroom when you made such a terrible noise? You woke up all the house in order to brush your teeth, I think that your teeth are so small that there is no need to brush them. Do you want to see some good teeth? Look at mine!"
Here Snowball opened his mouth and showed his white teeth, sharp as needles.
"Yours are very nice," said Stuart. "But mine are all right, too. As for exercise, I try to do it every day. I bet my stomach muscles are firmer than yours."
"I bet they are not," said the cat.