英语六级完形填空练习题及答案2
时间:2013-01-01
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Sleep is divided into periods of so-called REM sleep, characterized by rapid eye movements and dreaming, and longer pe
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.
41. [A] Either [B] Neither [C] Each [D] Any
42. [A] intended [B] required [C] assumed [D] inferred
43. [A] subtle [B] obvious [C] mysterious [D] doubtful
44. [A] maintained [B] described [C] settled [D] afforded
45. [A] in the light [B] by virtue [C] with the exception [D] for the purpose
46. [A] reduction [B] destruction [C] deprivation [D] restriction
47. [A] upon [B] by [C] through [D] with
48. [A] paid attention to [B] caught sight of [C] laid emphasis on [D] cast light on
49. [A] develop [B] produce [C] stimulate [D] induce
50. [A] if [B] as if [C] only if [D] if only
答案:BCCBD CADAB
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