SC - 1000 - #531

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f2001290: Master | Next Rank: 500 Posts; Posts: 400; Joined: Sat Mar 10, 2007 4:04 amFollowed by: 1 member; Thanked: 1 times

by f2001290 » Thu May 31, 2007 10:54 am

New techniques in thermal-scanning photography, a process that records radiation from surface areas, makes it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before.
(A) makes it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before
(B) make it possible to study, in greater detail, the effects of calefaction, or warming, of a river than ever before
(C) have made it possible to study in greater detail than ever before the effects of calefaction, or warming, of a river
(D) make possible the study of the effects of calefaction, or warming, of a river in greater detail than it ever was before
(E) has made it more possible than ever before to study in greater detail the effects of calefaction, or warming, of a river

OA after few explanations

Source: Beat The GMAT — Sentence Correction | Thu May 31, 2007 10:54 am

jayhawk2001: Community Manager; Posts: 789; Joined: Sun Jan 28, 2007 3:51 pmFollowed by: 1 member; Location: Silicon valley, California; Thanked: 30 times

Re: SC - 1000 - #531

by jayhawk2001 » Thu May 31, 2007 12:11 pm

f2001290 wrote:New techniques in thermal-scanning photography, a process that records radiation from surface areas, makes it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before.
(A) makes it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before
(B) make it possible to study, in greater detail, the effects of calefaction, or warming, of a river than ever before
(C) have made it possible to study in greater detail than ever before the effects of calefaction, or warming, of a river
(D) make possible the study of the effects of calefaction, or warming, of a river in greater detail than it ever was before
(E) has made it more possible than ever before to study in greater detail the effects of calefaction, or warming, of a river

OA after few explanations

"techniques" plural requires plural verb. A and E are out.

D has "make possible" which is awkward

In B, "greater ... than" is not linked correctly

Vote for C

sampleresume: Senior | Next Rank: 100 Posts; Posts: 55; Joined: Sun Apr 06, 2008 5:04 pm

by sampleresume » Sun Apr 13, 2008 5:19 pm

I chose B. Now I know why I was wrong. thanks

suyashjhawar: Newbie | Next Rank: 10 Posts; Posts: 2; Joined: Mon Apr 14, 2008 9:19 am

by suyashjhawar » Mon Apr 14, 2008 9:35 am

One more C.

logitech: Legendary Member; Posts: 2134; Joined: Mon Oct 20, 2008 11:26 pmFollowed by: 25 members; Thanked: 237 times; GMAT Score:730

by logitech » Sat Jan 17, 2009 9:14 pm

I know that GREATER THAN is used incorrectly in option B, but what do you we need HAVE MADE in option C ?

LGTCH
---------------------
"DON'T LET ANYONE STEAL YOUR DREAM!"

fighting_cax: Senior | Next Rank: 100 Posts; Posts: 67; Joined: Sat Feb 16, 2008 8:07 pm; Location: Philippines; Thanked: 3 times

by fighting_cax » Mon Jun 08, 2009 5:27 am

If we get down to the essence of the sentence, we can see that:

because of the new techniques in thermal-scanning photography --> possible to study the effects of calefaction (in greater detail than ever before)

Because we know that this technique (that was discovered in the past) has made it possible for further study to take place (presently), we use the present perfect tense.

Present perfect = have/has + past participle

Examples:
We HAVE LIVED in a little hut for three days.
Our country HAS ENFORCED strict immigration laws for thirty years.
They HAVE KNOWN each other for the longest time.

Immediately, we are down to 2 options that use the present perfect tense: option C and option E.

And because the subject in this sentence is plural --> NEW TECHNIQUES, our verb should be plural --> HAVE (instead of HAS).

Therefore, the answer is option C.

aj5105: Legendary Member; Posts: 1169; Joined: Sun Jul 06, 2008 2:34 amFollowed by: 1 member; Thanked: 25 times

by aj5105 » Mon Jun 08, 2009 6:19 am

Picked (C)

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