B1+ English Reading Test: Why We Sleep — Exercise 1
Read the text about why we sleep. For questions 1 to 9, decide whether each statement is True or False according to the text.
1Sleep is a period in which the brain and body stop most of their activity.
2The proportion of REM sleep generally becomes greater towards the morning.
3Sleeping only during the first half of the night provides the same benefits as a complete night of sleep.
4Staying awake to study may reduce a student's ability to concentrate the next day.
5A tired driver is only dangerous if they actually fall asleep at the wheel.
6Morning light can help the internal body clock recognise that daytime has started.
7Caffeine permanently removes the sleep pressure that develops while a person is awake.
8Sleeping much later at weekends can sometimes make Monday morning more difficult.
9The writer advises treating sleep-tracker results as estimates rather than medical conclusions.