It can be concluded from the first paragraph that

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions below.

   Sleep is a natural process, and although a lot have been written about the subject, it is still surrounded by mystery. It is used by some as an escape from the world, and regarded by others as an irritating waste of time: some people get by on very little, others claim they cannot exist without at least ten hours, but nobody can do without sleep completely.

   Our night’s sleep does not just consist of a steady phase of gradually deepening sleep. It alternates between two stages: Non-dreaming or ordinary sleep, and REM (rapid eye movement) or dreaming sleep. Assoon  as  we  fall  asleep, we go straight into non-dreaming sleep for an hour or so, then into REM sleep for about 15 minutes, then back into non-dreaming sleep. It alternates in this way for the rest of the night, with non-dreaming sleep tending to last longer at the beginning of the night. Non-dreaming sleep occupies three-quarters of our night’s sleep, about a quarter of it deep and the rest fairly light.

   It is widely believed that sleep repairs the body and makes good the damage caused by being awake. However, its main function is to refresh the brain. Experts believe that probably only about two-thirds of our sleep is necessary for repairing and refreshing the brain, with the most valuable sleep coming in the first few hours of the non dreaming period, the last few hours of sleep are not so essential. The brain can manage quite well with reduced sleep as long as it is uninterrupted sleep.

   The quality of sleep is important. A study conducted in the USA looked  at short sleepers, who slept for 5.5 hours on average, and long sleepers, who had 8.5 hours or more. It is discovered after a variety of tests that  the long sleepers were poor sleepers, had twice as much REM sleep as the short sleepers, appeared to sleep longer to make up for poor sleep, and did not wake up in the morning refreshed. Similarly, people who sleep deeply do not necessarily get a better quality of sleep than shallow sleepers. Deep sleepers can feel tired the following day, so six hours of good sleep is worth more than eight hours of troubled sleep.

From Awakening to Sleep – American Psychological Association

It can be concluded from the first paragraph that ______.

• A. people need equal time of sleep
• B. sleep remains a puzzle
• C. sleep is among the processes of the nature
• D. everything about sleep has been brought to light

• Câu 2: Mã câu hỏi: 1823

  The word “irritating” in paragraph 1 is closest in meaning to ______.

  • A. calming
  • B. soothing
  • C. annoying
  • D. comforting

• Câu 3: Mã câu hỏi: 1824

  All the following statements are true, EXCEPT for ______.

  • A. our night’s sleep occurs in a straight line of only two phases
  • B. all sleeps are similar in the alternatives of the two stages during the night
  • C. we spend only 25 percent of our night’s sleeping time dreaming
  • D. we often have no dreams right after we fall asleep

• Câu 4: Mã câu hỏi: 1826

  The word “it” in paragraph 2 refers to ______.

  • A. our night's sleep
  • B. the ordinary sleep
  • C. the REM 
  • D. the night

• Câu 5: Mã câu hỏi: 1827

  The word “occupies” in paragraph 2 could be best replaced by ______.

  • A. accounts for
  • B. takes care of
  • C. works out
  • D. goes up

• Câu 6: Mã câu hỏi: 1828

  Unlike the common belief, sleep helps ______.

  • A. not to be awake
  • B. us to fix the damage happening by day
  • C. us to repair our body
  • D. our brain to rest and recover

• Câu 7: Mã câu hỏi: 1829

  The study discussed in the reading passage suggests that ______.

  • A. the fewer hours we sleep, the more we dream
  • B. deep sleep means better sleep
  • C. the type of sleep is more important than its length
  • D. six hours of sleep is better than eight hours

• Câu 8: Mã câu hỏi: 1830

  Which of the following is NOT discussed in the passage?

  • A. The role of the sleep.
  • B. Sleepless people’s problems.
  • C. Types of sleep.
  • D. The circle of a sleep.

• Câu 9: Mã câu hỏi: 1831

  It can be inferred from the reading passage that ______.

  • A. if we can sleep uninterruptedly, it is not necessary to sleep the whole night
  • B. REM makes good our brain
  • C. nearly 70 % of our sleep is invaluable
  • D. dream enables our body to refresh when we can sleep uninterruptedly

• Câu 10: Mã câu hỏi: 1837

  This passage is the most likely taken from ______.

  • A. a doctor’s description
  • B. a health magazine
  • C. an advertisement
  • D. a fashion magazine