This is the Dialogue of two girls one who knows nothing about class, and the other just someone in her class.

Jane: "When does class start?"

Meg: "2:00 this afternoon."

Jane: "What class is at 2:00?"

Meg: "World History!"

       Jane: "What are we learning in world history?"
     
       Meg: "Whatever topic you were assigned."
     

       Jane: "What topic was I assigned?"
   
       Meg: "I don't know, you should know that."

       Jane: "When did we get the topic?"

       Meg: "Last Tuesday."

       Jane: "Was I in class last Tuesday?"

       Meg: "No."

       Jane: "Why wasn't I in class last Tuesday?"

       Meg: "Probably because you didn't know when class started."