题目内容：

There are times when people are so tired that they fall asleep almost anywhere. We can see a lot of people sleeping on the bus or train on their way home __1.__ work in the evening. A man will be reading the newspaper, and seconds later it appears as if he is trying to eat it. Or he will fall asleep on the shoulder of the stranger sitting next to him. Another place where __2.__ (plan) short sleep goes on is in the lecture hall __3.__ a student will start snoring so loudly that the professor has to ask __4.__ student to shake the sleeper awake. A more _5.__ (embarrass) situation occurs when a student starts falling into sleep and __6.__ weight of the head pushes the arm off the desk, and the movement carries the rest of the body along. The student wakes up on the floor with no memory of getting there. The __7._ (bad) time to fall asleep is when driving. Police reports are full of accidents that occur when people fall into sleep and go off the road. __8.__ the drivers are lucky, they are not seriously hurt. One woman’s car, for example, went into the river. She woke up in four feet of water and thought that it __9.__ (rain). When people are really tired, __10.__ will stop them from falling asleep — no matter where they are.