One day a professor entered the classroom and announced a surprise test．Hearing that，his students were all seated and waited quietly for the test to begin．The professor handed out the test papers with text facing down at the desk．Once he was done，he asked them to turn the test pages and begin．The students were confused．There was not a question but just a black dot in the center of the page．The professor noticed the students'facial expressions and told them，"I want you to write about what you see there．"The students were still in puzzle but got started with the test．At the end of the class，the professor took all answer sheets and started reading each answer from each sheet in front of all students．All of them described about the black dot and tried to explain its position．After the professor finished reading，the whole class fell into silence．"Now，"the professor began to explain，"don't worry．I am not going to give you grades for this．I just 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 same is with our lives．The white paper represents our whole life and the black spot represents problems in our life．Our life is a gift given to us by God，with love and care．We always have reasons to celebrate-our friends around us，the job that provides us our livelihood and the miracles we see everyday．Still we just focus on day-to-day problems like health issues，lack of money，problems in relationshipsetc．，but we never see that these problems are very small compared to everything we have in our lives．"28．Why did the professor give the surprise test？ ____ A．To grade his students．B．To puzzle his students．C．To inspire his students to think．D．To develop his students'writing ability．29．What made his students at a loss at first？ ____ A．The black dot in the centre．B．The paper without questions．C．The paper with text facing down．D．The professor's facial expressions．30．Which of the following best states the moral（精神上的） lesson of this story？ ____ A．Health counts more than money．B．Think twice before you take action．C．Take eyes off problems and enjoy blessings．D．Life is a gift，so always love everyone around you．

One day a professor entered the classroom and announced a surprise test．Hearing that，his students were all seated and waited quietly for the test to begin．The professor handed out the test papers with text facing down at the desk．Once he was done，he asked them to turn the test pages and begin．
The students were confused．There was not a question but just a black dot in the center of the page．The professor noticed the students'facial expressions and told them，"I want you to write about what you see there．"
The students were still in puzzle but got started with the test．At the end of the class，the professor took all answer sheets and started reading each answer from each sheet in front of all students．All of them described about the black dot and tried to explain its position．After the professor finished reading，the whole class fell into silence．
"Now，"the professor began to explain，"don't worry．I am not going to give you grades for this．I just 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 same is with our lives．The white paper represents our whole life and the black spot represents problems in our life．Our life is a gift given to us by God，with love and care．We always have reasons to celebrate-our friends around us，the job that provides us our livelihood and the miracles we see everyday．Still we just focus on day-to-day problems like health issues，lack of money，problems in relationshipsetc．，but we never see that these problems are very small compared to everything we have in our lives．"
28．Why did the professor give the surprise test？ ____
A．To grade his students．
B．To puzzle his students．
C．To inspire his students to think．
D．To develop his students'writing ability．
29．What made his students at a loss at first？ ____
A．The black dot in the centre．
B．The paper without questions．
C．The paper with text facing down．
D．The professor's facial expressions．
30．Which of the following best states the moral（精神上的） lesson of this story？ ____
A．Health counts more than money．
B．Think twice before you take action．
C．Take eyes off problems and enjoy blessings．
D．Life is a gift，so always love everyone around you．