Mrs. Smith loves flowers and she has a small but beautiful garden. In summer, her flowers are usually the best in the street. One summer afternoon, her bell rings(铃响)and she finds a small boy outside her door. He is about six years old and having a big bunch(花束) of beautiful flowers in his hand.
"I’m selling flowers, " he says. "Do you want any They are very cheap and they are very good."
"My boy, " Mrs. Smith says, "I can pick flowers if I want, and I needn’t buy any flowers, because I have a lot in my garden."
"Oh, now you haven’t, " says the boy. "There aren’t any flowers in your garden because they are here in my hand." Mrs. Smith does not want to buy flowers because ______.