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 ______home from work in the evenings. A man will be______the newspaper, and seconds later it _____ as if he is trying to ____it. Or he will fall asleep on the shoulder of the stranger_____ next to him.______ place where unplanned short sleep ____ is in the lecture hall where a student will start snoring（打鼾）so _______that the professor has to ask another student to______ the sleeper awake. A more embarrassing（尴尬）situation occurs when a student starts falling into sleep and the ______ of  the head pushes the arm off the______, and the movement carries the_____ of the body along. The student wakes up on the floor with no______ of getting there. The worst time to fall asleep is when _____ . Police reports are full of ______ that occur when people fall into sleep and go_______ the road. If the drivers are _______ , they are not seriously hurt. One woman's car, _______ , went into the river. She woke up in four feet of ______ and thought it was raining. When people are really ________，nothing will stop them from falling asleep -- no matter where they are.

A．way B．track C．path D．road