answer: Mike was absent yesterday for sickness, so 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.