根据短文内容的理解，选择正确答案。

    Mr. Turner is standing near the window. His wife, Mrs. Turner, is sitting behind him. She is reading a book. She closes the book(合上书)and asks her husband(丈夫), "What are you looking at?"

    "I'm looking at a boy," Mr. Turner answers. "He's under the tree near our house. He's looking at my bike."

    "Oh," Mrs. Turner says, "what is he doing now?"

    "He's cleaning the seat(座)," says Mr. Turner. "Now he is riding my bike."

    Mrs. Turner looks out of the window and then she says, "Ah, don't you know who he is? He is our son! He is going to school. You must wear glasses!"