answer: Mike was absent for sickness. Miss Li asks him to preview the reading material.
documents: #Person1#: Good morning, Miss Li.
  #Person2#: Morning, Mike.
  #Person1#: I'm sorry that I was absent yesterday.
  #Person2#: I've already got your certificate for sick leave. How do you feel today?
  #Person1#: I feel much better now.
  #Person2#: Have you received the reading material handed out yesterday?
  #Person1#: I've already got it. Thanks.
  #Person2#: I will explain it in detail in the next class, could you preview it?
  #Person1#: I will.