Source: Official Guide for GMAT Review 2016 Sentence Correction; #19

1

Sunspots, vortices of gas associated with strong

Sunspots, vortices of gas associated with strong electromagnetic activity, are visible as dark spots on the surface of the Sun but have never been sighted on the Sun's poles or equator.

1 Explanation

4

Gravatar Mike McGarry, Magoosh Tutor

Aug 18, 2015 • Comment

Lam Kam Ming

For (e), "dark spots on the Sun's surface, which ..."

it's ok to have a prepositional phrase in between "dark spots" and "which"?

I thought it's ok and which... is still modifying dark spots.

Aug 9, 2017 • Reply

Adam

Hi Lam,

I agree with you that "which" does correctly modify "dark spots" because "on the Sun's surface" is a vital modifier here. However, "which" is incorrect due to meaning. We need a "but" because there's a contrast in meaning here: The sunspots are visible as dark spots, BUT they are not visible on the poles or equator.

Aug 10, 2017 • Reply

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Official Guide for GMAT Review 2016

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Revised GRE PDF 2nd Ed.


Section 9.6 Sentence Correction

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