2005年Use
of English
";="" color:="" rgb(51,="" 51,="" 51);"="" lang="EN-US">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 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
