When allowed to sleep, volunteers who were kept awake as many as 100 hours dreamed __________ than usual.
举一反三
- Two groups of people are compared in the third study. They are people______. A: with less than5 hours of sleep a night and with 7 to 9 hours of sleep B: who slept 4 hours a night and who slept 4 hours for 2 nights C: with less than 4 hours of sleep a night and with 7 to 9 hours of sleep D: with less than 5 hours of sleep a night and with 8 hours of sleep
- We _____ for three hours when we were allowed to enter.
- When I ________ less than eight hours of sleep, I feel tired all day.
- There were many more people who got injured in the big fire than ( ).
- What is TRUE of human sleep A: Most people need less sleep when grow older. B: Most people need seven and a half hours of sleep every night. C: On average, people in the U. S. today sleep less per night than they used to. D: For most people, less than six hours of sleep on a typical work night is enough.