2016考研英语冲刺模拟题及答案(8)

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2016考研初试临近，最后阶段同学们要开启模拟冲刺阶段，所谓模拟冲刺，目的在于让大家提前进入到模考状态。新东方在线考研分享2016考研英语模拟试题赶快来练练手吧！
    2016考研英语冲刺模拟题及答案(8)
    The human nose is an underrated tool. Humans are often thought to be
insensitive smellers compared with animals, __1__ this is largely because, __2__
animals, we stand upright. This means that our noses are __3__ to perceiving
those smells which float through the air, __4__ the majority of smells which
stick to surfaces. In fact, __5__, we are extremely sensitive to smells, __6__
we do not generally realize it. Our noses are capable of __7__ human smells even
when these are __8__ to far below one part in one million. 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 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] determining [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
    　　参考答案：
    1-5. [C]. [B]. [A]. [C]. [B]
    6-10. [A]. [D]. [A]. [D]. [B]
    11-15. [C]. [A]. [D]. [C]. [D]
    16-20. [B]. [C]. [D]. [A]. [B]