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# Because Halleys comet changes orbit slightly during the

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Manager
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Because Halleys comet changes orbit slightly during the [#permalink]

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27 Jan 2010, 11:49
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163. Because Halley’s comet changes orbit slightly during the seventy-six-year interval between passing close to Earth, it may veer onto a collision course with a planet sometime in the distant future.
(A) between passing
(B) of passing
(C) between its passes
(D) of its passes
(E) as it passes

How to deal with this?
Joined: 20 Aug 2009
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Location: Tbilisi, Georgia
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Re: How to deal with this? [#permalink]

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27 Jan 2010, 12:02
Well, "between its passes" sounds right. (C)
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Re: How to deal with this? [#permalink]

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27 Jan 2010, 12:14
vageesh wrote:
163. Because Halley’s comet changes orbit slightly during the seventy-six-year interval between passing close to Earth, it may veer onto a collision course with a planet sometime in the distant future.
(A) between passingunidiomatic
(B) of passingnot parallel with the second half of the sentence
(C) between its passesits is not parallel with Halley's Comet
(D) of its passesits is not parallel with Halley's Comet
(E) as it passesCorrect.

How to deal with this?

I am nt sure hw can C be the answer..
IMO the ans is E
OA plz?
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Joined: 20 Aug 2009
Posts: 307
Location: Tbilisi, Georgia
Schools: Stanford (in), Tuck (WL), Wharton (ding), Cornell (in)
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Kudos [?]: 150 [0], given: 69

Re: How to deal with this? [#permalink]

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27 Jan 2010, 12:26
The change of orbit happens during 76 year time interval. The underlined part of sentence should define the interval we are talking about

"as it passes" denotes one point of time, not the interval.

"interval" is time period between two events, in this case - between comet's two passes close to earth
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Re: How to deal with this? [#permalink]

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27 Jan 2010, 15:07
Quote:
163. Because Halley’s comet changes orbit slightly during the seventy-six-year interval between passing close to Earth, it may veer onto a collision course with a planet sometime in the distant future.
(A) between passing
(B) of passing
(C) between its passes
(D) of its passes
(E) as it passes

Step 1) Figure out what the sentence is trying to say. Basically there's a 76 year waiting period between each pass.

Step 2) Recognize that "between passing" doesn't make sense. I was initially looking for something in the form of "between passing [X] and verb-ING [Y]" but did not see any of that.

Step 3) Glance through answer choices to see what sounds right. Although (E) sounds right, it changes the original meaning of the sentence. With (E), it's saying that during the 76 years, the comet passes the Earth. It's like saying it takes 76 years for the comet to finish passing the Earth--this doesn't make sense.

Step 4) What we're trying to say is that the comet passes....and then there's a silent period of 76 years...and then the comet passes again. Specifically during this time period "between its passes" blah blah blah.

Step 5) So "between its passes" is most appropriate. Answer (C)
Re: How to deal with this?   [#permalink] 27 Jan 2010, 15:07
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