大学英语六级阅读模拟试题（五）

>>英语六级阅读提高练习题：大学英语六级阅读模拟试题指导（五）

>>英语六级预测试卷讲解课程

Part V Cloze (15 minutes)   

Directions: There are 20 blanks in the following passage. For each blank there are four choices marked A), B), C) and D) on the right side of the paper. You should choose the ONE that best fits into the passage. Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre.  

注意：此部分试题请在答题卡2上作答。   

The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals,  62   this is largely because,  63  animals, we stand upright. This means that our noses are   64   to perceiving those smells which float through the air,   65  the majority of smells which stick to surfaces. In fact  66  , we are extremely sensitive to smells,    67  we do not generally realize it. Our noses are capable of  68  human smells even when these are   69   to far below one part in one million.   

Strangely, some people find that they can smell one type of flower but not another,  70   others are sensitive to the smells of both flowers. This may be because some people do not have the genes necessary to generate   71   smell receptors in the nose. These receptors are the cells which sense smells and send  72   to the brain. However, it has been found that even people insensitive to a certain smell  73  can suddenly become sensitive to it when   74   to it often enough.   

The explanation for insensitivity to smell seems to be that brain finds it    75  to keep all smell receptors working all the time but can   76  new receptors if necessary. This may   77  explain why we are not usually sensitive to our own smells we simply do not need to be. We are not   78  of the usual smell of our own house but we  79  new smells when we visit someone else's. The brain finds it best to keep smell receptors   80  for unfamiliar and emergency signals   81  the smell of smoke, which might indicate the danger of fire.   

62.［A］although  ［B］as  ［C］but   ［D］while  

63.［A］above   ［B］unlike  ［C］excluding  ［D］besides   

64.［A］limited  ［B］committed［C］dedicated ［D］confined   

65 ［A］catching  ［B］ignoring［C］missing  ［D］tracking   

66.［A］anyway  ［B］though  ［C］instead   ［D］therefore   

67.［A］even if ［B］if only ［C］only if  ［D］as if   

68.［A］distinguishing  ［B］discovering［C］determining ［D］detecting   

69.［A］diluted  ［B］dissolved ［C］determining ［D］diffused   

70.［A］when   ［B］since  ［C］for  ［D］whereas   

71.［A］unusual  ［B］particular  ［C］unique  ［D］typical   

72.［A］signs  ［B］stimuli  ［C］messages  ［D］impulses  

73.［A］at first  ［B］at all  ［C］at large ［D］at times  

74.［A］subjected ［B］left    ［C］drawn  ［D］exposed   

75.［A］ineffective ［B］incompetent ［C］inefficient  ［D］insufficient   

76.［A］introduce  ［B］summon ［C］trigger  ［D］create  

77.［A］still    ［B］also    ［C］otherwise  ［D］nevertheless   

78.［A］sure   ［B］sick   ［C］aware  ［D］tired   

79.［A］tolerate ［B］repel  ［C］neglect ［D］notice   

80.［A］available  ［B］reliable ［C］identifiable ［D］suitable   

81.［A］similar to ［B］such as   ［C］along with ［D］aside from

对这套英语六级阅读提高练习题的练习未完待续，登录坦途网英语六级考试频道，更多英语六级预测卷供你练习，让你在英语六级阅读模拟试题中不断地练习，提升自己的能力。