题目内容：

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填人一个适适的词或使用括号中词语的正确形式填空，并将答案填写在答卷标号的相应位置上。

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.