41. admitted believed claimed predicted
42. plain average mean normal
43. momentary prompt instant immediate
44. bulk host gross magnitude
45. On With For By
46. broadly thoroughly generally completely
47. however meanwhile therefore moreover
48. at in about for
49. manifested approved shown speculated
50. noted impressed labeled marked
thoroughly 动作的彻底
总分总结构举例
Cloze Test 3
Sleep is divided into periods of so-called REM sleep, characterized by rapid eye movements and dreaming, and longer periods of non-REM sleep. 41 kind of sleep is at all well-understood, but REM sleep is 42 to serve some restorative function of the brain. The purpose of non-REM sleep is even more 43 . The new experiments, such as these 44 for the first time at a recent meeting of the Society for Sleep Research in Minneapolis, suggest fascinating explanations 45 of non-REM sleep.
For example, it has long been known that total sleep 46 is 100 percent fatal to rats, yet, 47 examination of the dead bodies, the animals look completely normal. A research has now 48 the mystery of why the animals die. The rats 49 bacterial infections of the blood, 50 their immune systems-the self-protecting mechanism against diseases-had crashed.
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