manhattangmat 上有讨论这道题的帖子,
RonPurewal 老师说选D.
http://www.manhattangmat.com/forums/responding-to-the-public-s-fascination-with-and-sometimes-t8246.html摘录如下:
(d) is the best answer, although (c) is not too far behind.
i can see that (c) is unacceptably informal / casual, and maybe even unidiomatic, but i can only see that because i'm a seasoned writer and reader of formal english.
for those of you who are not native speakers of english - the best approach to problems such as this one is:
*
note the differences in usage between the formal and informal
- e.g., "rate how likely" vs. "rate the likelihood that..."
*
remember what these differences look like, so that you can make similar distinctions in the future.
(e) is wrong, since you can't use both "likelihood" and "may"... redundancy.
shri312 wrote:Ron,
Doesn't answer Choice " E "states the scale itself rates the likelihood of a asteroid?yes, that's another problem -- an asteroid itself doesn't have a "likelihood". good find.
i.e., only EVENTS have a "likelihood". an asteroid is a physical object, not an event, so it makes no sense to speak of its "likelihood".
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另一个老师关于scale to rate 还是scale for rating的解释:
hello
could you please explain whether phrase 'developed a scale for rating ' is correct .
I thought correct choice of words would be 'developed a scale to rate '
thanks in advance
It's because the author intends the purpose (rate something) to be more closely related to the scale than the development process. It's a "scale for rating"; either one can be used correctly depending on the author's preference.  
lease keep in mind that just because one answer choice is correct doesn't mean that EVERYTHING that's different about another choice is wrong. Sometimes the GMAT tosses out a split that just doesn't matter (although this is far less common than splits that matter)..
-- by 会员 silvia03 (2010/10/7 13:25:12)