A. fall asleep again B. become more energetic
the following day C. sleep less than 7 hours
D. confirm those serious consequences E. suffer sleep
problems F. sleep more than 8 hours
填空题
To get a good night's rest, people may not need to ______.
填空题
Long sleepers are reported to be more likely to ______.
填空题
One of the sleep problems is waking in the middle of the night ,unable to ______.
填空题
One survey showed that people who habitually ______ each night have a higher risk of dying.