The tall man was sitting in the chair. He was reading a book. When I talked to him, I found that from boyhood  , he had the habit   of carrying a little book in his pocket. He often read every minute when he was not doing anything else. He found a book very useful during the time of waiting, such as waiting for meals, buses, doctors, telephone calls, plays to begin or something to happen. That was how he found his fifteen minutes a day for reading. That was how he read his twenty books a year --one thousand in his lifetime. Sometimes the man read in the theatre, because   _  .
the play was not interesting the play didn't begin the play was over the man didn't like the play