Ⅳ。 Reading Comprehension (60 points)
Directions：
There are four reading passages in this part Each passage is followed by five questions. For each question there are four suggested answers marked A， B， C and D. Choose one best answer and blacken the corresponding letter on the Answer Sheet.
Passage One
Researchers have found that REM (rapid eye movement) sleep is important to human beings. This type of sleep generally occurs four or five times during one night of sleep lasting five minutes to forty minutes for each occurrence. The deeper a person‘s sleep becomes， the longer the periods of rapid eye movement.
There are physical charges in the body to show that a person has changed from NREM (non-rapid eye movement) to REM sleep. Breathing becomes faster， the heart rate increases， and， as the name implies， the eyes begin to move quickly.
Accompanying these physical changes in the body is a very important characteristic of REM sleep. It is during REM sleep that a person dreams.
61. According to the passage， how often does REM sleep occur in one night?
A. Once B. Twice C. Four of five times D. Forty times
62. The word “deeper” in paragraph 1 is closest in meaning to which of the following?
A. heavier. B. louder. C. stronger. D. happier.
63. Which of the following shows that a person is NOT dreaming in his sleep?
A. His eyes begin to move. B. His breathing becomes faster.
C. His heart rate increases. D. His eyes stop moving.
64. The subject of this passage is ________.
A. why people sleep B. the human need for REM sleep
C. the characteristic of REM sleep D. physical changes in the human body
65. Which of the following is the best title of the article?
A. REM Sleep B. Two Types of Sleep C. Sleepers D. What Happens to Sleepers
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