Kicked me in the back. How to add funny words?

Laugh at the classic joke A roommate is preparing for the civil service exam. After reading it for a while, he said, "How can there be a problem with this exam?" . . Astronomy, geography, human history. "Another roommate came leisurely and said," Civil servants always chat when they go to work. Who will talk to you if they don't have extensive knowledge? " .。" After listening, everyone was speechless. . .