求助~有几道不会的语法

deng2y · 发表于 2009-12-13 11:00:47

1 Once common throughout the Western plains,black-footed ferrets are thought to have declined in numbers as a result of the poisining of prairie dogs,their prey.
(A) black-footed ferrets are thought to have declined in number as
(B) it is thought that the decline in number of black-footed ferrets is
(C) the decline in the number of black-footed ferrets is thought of as
(D) that black-footed ferrets have declined in their numbers is thought to be
(E) the numbers of the black-footed ferret are thought to have declined as

Once positioned in space,the Hubble Space Telescope will capture light from sources twenty times fainter compared to those that can be detected by ground-based instruments.
(A) campared to those that can be detected
(B）compared to those they can detect
(C) than that can be detected
(D) than those that can be detected
(E) than those detecting

yin_jiadong · 发表于 2009-12-13 12:35:40

1. A, D中 declined in number的说法错误；E中the numbers错误；B中number前缺少特指定冠词the。选C。
2. 根据light是不可数名词，可以直接排除A,B,D,E。C正确，这里比较成分抽出来就是light from sources is twenty times fainter than that can be detected by ground-based instruments.

deng2y · 发表于 2009-12-13 23:28:24

谢谢这位同学~不过我手上的答案是第一题选A,第二题选D~我也觉得蛮纠结的~

sunsetchen · 发表于 2009-12-14 22:50:57

第一题选A,第二题选D
因为第一题c中后面加了of很奇怪，至于为什么a中declined 后面要加in number,是因为如果不加的话逻辑就出现错误，black-footed ferrets 是不能declined,只有number可以decline

第二题中后面的指示代词是指代sources,所以必须用those

deng2y · 发表于 2009-12-15 13:11:49

谢谢~那第一题我算懂了~第二题的话，请问要怎么看出来句中的指示代词是sources,而不是light的呢？

非姿非凡 · 发表于 2009-12-15 21:32:29

第一题是从句首判断出来的啊~~句首的逻辑主语是ferrets。。。所以只能选A啊~~

求助~有几道不会的语法

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