One day, when Jack is taking a walk on the street, he hears a voice. He finds a girl crying in the street. "Why are you crying, little girl?" Jack asks. "I lost my doll," the girl answers. "Don't cry, little girl. I'll go to the shop and buy a new doll for you," Jack says. So the little girl follows Jack to the shop and Jack buys a very nice doll for her. The little girl begins to feel happy. Then Jack says goodbye to her. But a few minutes later, Jack hears the girl crying again. "Why are you crying again?" Jack asks the little girl. "If I hadn't lost my doll, I'd have two dolls!" the girl says. Which sentence is right?
Jack knows the little girl. Jack buys two nice dolls for the little girl. The little girl has two dolls at last. The little girl has only one doll at last.