One day a teacher entered(走进)the classroom and told the students about a surprise test. Then the teacher gave out the test papers to all students. When the students saw the test paper, they were very confused(迷惑的), because there was only a black dot(点) in the center of it. The teacher said, "Please write about what you have seen."
When the students were finished. the teacher took all the answer sheets(答题纸)and read each answer.
After having finished reading, the teacher began to explain, "Don't worry! I asked you to do this only because I want you to think about something. Here, everyone focused on the black dot, and wrote about it. But no one wrote about the white paper. The white paper is the same as our life, and the black dot is problems In our life. Our life is a gift with love. And we should have reasons(理由) to be happy. But we sometimes only see the problems. From this, I want to tell you problems are only a very small part in our life. "