There are a few short articles, please help! thank you

"Put on your coat and let's go for a walk."

Bill is very happy. He likes going out with his father.

He put on his coat and hat and said, "Dad, I'm ready."

Bill and his father took to the streets. They suddenly saw a big black dog. The dog began to growl. Bill is a little afraid of dogs. He wants to go home. His father said, "Don't be afraid, Bill. No, do you know the proverb "A growling dog doesn't bite"? "

"Oh, yes," said Bill, "I know this proverb, and so do you, but does the dog know it?"

This is a joke.