Strangely, some people find that they can smell one type of flower but not another, _9_ others are sensitive to the smells of both flowers. This may be because some people do not have the genes necessary to generate _10_ smell receptors in the nose. These receptors are the cells which sense smells and send _11_ to the brain. However, it has been found that even people insensitive to a certain smell _12_ can suddenly become sensitive to it when _13_ to it often enough.
The explanation for insensitivity to smell seems to be that the brain finds it _14_ to keep all smell receptors working all the time but can _15_ new receptors if necessary. This may _16_ explain why we are not usually sensitive to our own smells—we simply do not need to be. We are not _17_ of the usual smell of our own house, but we _18_ new smells when we visit someone else’ s. The brain finds it best to keep smell receptors _19_ for unfamiliar and emergency signals _20_ the smell of smoke, which might indicate the danger of fire.

1.    [A] although        [B] as            [C] but            [D] while
2.    [A] above            [B] unlike        [C] excluding    [D] besides
3.    [A] limited            [B] committed    [C] dedicated    [D] confined
4.    [A] catching        [B] ignoring        [C] missing        [D] tracking
5.    [A] anyway            [B] though        [C] instead        [D] therefore
6.    [A] even if            [B] if only        [C] only if        [D] as if
7.    [A] distinguishing    [B] discovering    [C] determining    [D] detecting
8.    [A] diluted            [B] dissolved    [C] dispersed    [D] diffused
9.    [A] when            [B] since        [C] for            [D] whereas
10.    [A] unusual            [B] particular    [C] unique        [D] typical
11.    [A] signs            [B] stimuli        [C] messages    [D] impulses
12.    [A] at first            [B] at all        [C] at large        [D] at times
13.    [A] subjected        [B] left            [C] drawn        [D] exposed
14.    [A] ineffective        [B] incompetent    [C] inefficient    [D] insufficient
15.    [A] introduce        [B] summon        [C] trigger        [D] create
16.    [A] still                [B] also            [C] otherwise    [D] nevertheless
17.    [A] sure            [B] sick            [C] aware        [D] tired
18.    [A] tolerate            [B] repel        [C] neglect        [D] notice
19.    [A] available        [B] reliable        [C] identifiable    [D] suitable
20.    [A] similar to        [B] such as        [C] along with    [D] aside from

1.    [C]    2.    [B]    3.    [A]    4.    [C]    5.    [B]
6.    [A]    7.    [D]    8.    [A]    9.    [D]    10.    [B]
11.    [C]    12.    [A]    13.    [D]    14.    [C]    15.    [D]
16.    [B]    17.    [C]    18.    [D]    19.    [A]    20.    [B]
 
2006年考研英语（一）Cloze Test
Directions:
Read the following text. Choose the best word(s) for each numbered blank and mark [A], [B], [C] or [D] on ANSWER SHEET 1. (10 points)
The homeless make up a growing percentage of America’s population. _1_ homelessness has reached such proportions that local governments can’t possibly _2_. To help homeless people _3_ independence, the federal government must support job training programs, _4_ the minimum wage, and fund more low-cost housing.
_5_ everyone agrees on the number of Americans who are homeless. Estimates _6_ anywhere from 600,000 to 3 million. _7_ the figure may vary, analysts do agree on another matter: that the number of the homeless is _8_. One of the federal government’s studies _9_ that the number of the homeless will reach nearly 19 million by the end of this decade.
Finding ways to _10_ this growing homeless population has become increasingly difficult. _11_ when homeless individuals manage to find a _12_ that will give them three meals a day and a place to sleep at night, a good number still spend the bulk of each day _13_ the street. Part of the problem is that many homeless adults are addicted to alcohol or drugs. And a significant number of the homeless have serious mental disorders. Many others, _14_ not addicted or mentally ill, simply lack the everyday _15_ skills needed to turn their lives _16_. Boston Globe reporter Chris Reidy notes that the situation will improve only when there are _17_ programs that address the many needs of the homeless. _18_ Edward Zlotkowski, director of community service at Bentley College in Massachusetts, _19_ it, “There has to be _20_ of programs. What’s needed is a package deal.”
 
1.    [A] Indeed        [B] Likewise            [C] Therefore        [D] Furthermore
2.    [A] stand        [B] cope                [C] approve            [D] retain
3.    [A] in            [B] for                [C] with                [D] toward
4.    [A] raise        [B] add                [C] take                [D] keep
5.    [A] generally    [B] almost            [C] hardly            [D] not
6.    [A] cover        [B] change            [C] range            [D] differ
7.    [A] Now that    [B] Although        [C] Provided            [D] Except that
8.    [A] inflating    [B] expanding        [C] increasing        [D] extending
9.    [A] predicts        [B] displays            [C] proves            [D] discovers