完形填空
One day, a professor walked into the classroom and asked his students to get ready for a surprise test. They 1 anxiously(焦急地) at their desks for the test to begin. The professor handed out the question paper with the text facing 2 as usual. Once he handed them all out, he asked his students to3 the page and begin. To everyone's4 , there were no questions, just a black dot (点) in the center of the paper.
5 seeing the expression (表情) on everyone's face, the professor told them, "I want you to6 what you see there. "The confused(困惑的) students had no choice but to begin. At the end of the class, the professor took all the answer papers and started reading 7 one of them aloud in front of all the students. All of them 8 the black dot.
After all were read, the classroom was 9 . The professor began to explain, "I am not going to grade you this time, I just wanted to give you something to think about. No one wrote about the10 part of the paper. Everyone focused on the black dot. The11 thing happens in our life. Our life is a12 given to us with love and care. We have all kinds of reasons to celebrate. "
"However, we only see the 13 , like being short of money, not winning the first prize, missing the early bus, etc. But do you know that they are14 compared to (与…相比) everything we have in our lives. Take your15 away from the black spots in your life. Enjoy each moment that life gives you. Be happy and live a life with a positive mind!"