¡¡¡¡41.
¡¡¡¡£¨a£© he was taking a walk.
¡¡¡¡£¨b£© he was talking to professor calhoun.
¡¡¡¡£¨c£© he was having problems with his car.
¡¡¡¡£¨d£© he was eating dinner.
¡¡¡¡42.
¡¡¡¡£¨a£© admission forms.
¡¡¡¡£¨b£© solar energy.
¡¡¡¡£¨c£© auto maintenance.
¡¡¡¡£¨d£© course requirements for engineers.
¡¡¡¡43.
¡¡¡¡£¨a£© three.
¡¡¡¡£¨b£© four.
¡¡¡¡£¨c£© five.
¡¡¡¡£¨d£© six.
¡¡¡¡44.
¡¡¡¡£¨a£© one.
¡¡¡¡£¨b£© two.
¡¡¡¡£¨c£© three.
¡¡¡¡£¨d£© four.
¡¡¡¡45.
¡¡¡¡£¨a£© drive her to the lecture.
¡¡¡¡£¨b£© let her give him a ride.
¡¡¡¡£¨c£© borrow her car.
¡¡¡¡£¨d£© get his car repaired.
¡¡¡¡46.
¡¡¡¡£¨a£© to make recommendations on sensible dieting.
¡¡¡¡£¨b£© to report the latest advances in brain surgery.
¡¡¡¡£¨c£© to relate an experiment combining sleep and exercise.
¡¡¡¡£¨d£© to advise on ways of dealing with sleep difficulties.
¡¡¡¡47.
¡¡¡¡£¨a£© your heart rate is lowered.
¡¡¡¡£¨b£© it becomes harder to relax.
¡¡¡¡£¨c£© you become too tired to sleep.
¡¡¡¡£¨d£© sleep rhythms are disrupted.
¡¡¡¡48.
¡¡¡¡£¨a£© failure to rest during the day.
¡¡¡¡£¨b£© lack of sleep on weekends.
¡¡¡¡£¨c£© vigorous exercise in the evening.
¡¡¡¡£¨d£© eating cheese before going to bed.
¡¡¡¡49.
¡¡¡¡£¨a£© they might eventually cause you to lose sleep.
¡¡¡¡£¨b£© they help produce a neurotransmitter in the brain.
¡¡¡¡£¨c£© you must not drink milk if you take them.
¡¡¡¡£¨d£© they make it unnecessary to take naps.
¡¡¡¡50.
¡¡¡¡£¨a£© at a radio station.
¡¡¡¡£¨b£© in a lecture hall.
¡¡¡¡£¨c£© in a biology lab.
¡¡¡¡£¨d£© at the doctor's office.
