There are times when people are so tired that they fall asleep almost anywhere. We can see there is a lot of sleeping on the bus or train on the    1    home from work in the evenings. A man will be    2    the newspaper, and seconds later it    3    as if he is trying to eat it. Or he will fall asleep on the shoulder of the stranger    4    next to him. Another place where unplanned short sleep goes on is in the lecture hall in the campus where a student will start snoring(打鼾)so    5    that the professor has to ask another student to    6    the sleeper awake.