题目

阅读理解It's common for some high school students to need the helpof a math teacher. For others, numbers come naturally. And then there's TamarBarabi. The Israeli teenager just invented a new geometric theorem(几何定理). Like most discoveries, the moment happened by accident. Tamar handed in her math homework and the teacher said the theory she used to solve the problem didn't actually exist. She said if I could prove it, it could be my theory. So that's what happened,Barabi said. With help from her dad, who is also a math teacher, they sent the theorem to experts around the world. Kno15．-Could you please not run in the hallways？-      ．（　　）A．Sure，I'll do it right awayB．No，not at allC．Sorry．I won't do it again