题目

That holiday morning I didn't have to attend school. Usually，on holidays，Mother___41____me to sleep in．And I would certainly take full advantage of it．On this particular morning，___42____I felt like getting up early． I stood by my window overlooking the ___43____ having nothing better to do．But as it turned out，I was soon to learn about something___44____ in life． As I watched several people go by，get into their cars and go off，I ___45____an old man on a bicycle with a bucket on its ___46____and a basket of rags and bottles on its back-carriage ． He ___47____from 某人沿一条直路用1小时走完了6千米路程，休息半小时后又用1小时继续向前走了4千米路程，这人在整个过程中的平均速度是    千米/小时．