Question

    A strange thing happens to nearly everybody at night. They 1 the lights,cover themselves up with a quilt and close their eyes. After they sleep for six or seven 2 ,they wake up again. It sounds very strange,doesn’t it?

    Sleep puzzles (使困惑) science all the time. 3 and doctors would like to talk about why someone can’t fall asleep. They are not so sure 4 causes (引起) sleep.

    You will sleep the best both 5 you are in good health and when you don't eat too much or too little. No worries and a comfortable place to sleep are 6 too. They advise against two in one bed. 

    Strange things 7 during sleep. For example,you often move during your sleep. You will feel 8 if you don't move. You also 9 Part of your brain (大脑) is still 10 when you dream.

    Don’t worry if you dream. Some great stories and poems were finished while their writers were dreaming.

() 1. A. turn on   B. turn off   C. turn up   D. turn down

() 2. A. seconds   B. hours   C. days   D. months

() 3. A. Scientists   B. Nurses   C. Artists   D. Inventors

() 4. A. why   B. how   C. which   D. what

() 5. A. after   B. when   C. before   D. until

() 6. A. pleased   B. possible   C. important   D. funny

() 7. A. happen   B. happens   C. happened   D. happening

() 8. A. hungry   B. tired   C. relaxed   D. worried

() 9. A. sleep   B. wake up   C. think   D. dream

() 10. A. wake   B. asleep   C. awake   D. sleepy

Answer 1

1. B 2. B 3. A 4. D 5. B 6. C 7. A 8. B 9. D 10. C