answer: #Person2# still worries about #Person2#'s chemistry examination even though it's over.
documents: #Person1#: Your chemistry examination is over, isn't it? Why do you still look so worried?
  #Person2#: I don't know. It wasn't that the questions were too hard, or they were too many of them. But I'm still feeling uneasy because the exam didn't seem to have much to do with the course material.