kukulkan
bb, the following link is one of the best in my books. You can almost find anything that you are looking for- not just for GMAT purposes, but for general writing, etc. This is a terrific collection of online resources.
I have no doubt that you and probably most of the forum members already know about this source.
https://writing-program.uchicago.edu/res ... rammar.htmonce in, you can choose from American Heritage site, Darling's guide, common errors in english, and many more from the collection.
This is tricky. You're wrong when you say "that" modifies the noun immediately preceding it. Here's how it works.
Suppose the following structure
NOUN1 + PREPOSITION + NOUN2 + THAT
Here that can refer either to NOUN1 or to NOUN2, only using the context and the verb you'll know to which one that refers. The same reasoning can be applied to which. However, looking at examples in OFFICIAL PROBLEMS I've noticed the following pattern
if you have NOUN1 + PREPOSITION + NOUN2 + THAT
normally that refers to NOUN1
here are some examples extracted from OFFICIAL PROBLEMS (I'm writing this in capitals because it is the resource you should mainly use in SC)
Problem 116 OG 11
Out of America's fascination with all things antique has grown
a market for bygone styles of furniture and fixtures that is bringing GMAT prep sentence
dolphins are more closely related to some of the oldest known even-toed ungulates—
a group of hoofed mammals that today includes cows, camels, pigs, and hippos
Problem 34 verbal review second edition
people tend to overestimate the amount of energy used by visible
equipment,
such as lights,
that must be turned on and off
an exception to this pattern is the structure
one of X that ... here that refers to X
a higher interest rate is only one of the
factors that keeplook for more sentences among official resources.
On the other hand if you have a sentence with the following structure
NOUN1 + PREPOSITION + NOUN2, WHICH
normally which refers to noun2. This is the common situation that appears in most problems. However is possible that which refers to noun 1 without the comma. Look at the following GMAT prep sentence
Changes in sea level result not only from
changes in water temperature,
which affect water density, but also from the melting of glaciers
you don't have a problem here because changes is plural and the verb affect agrees with it.
To sum up, although in general that refers to the preceding noun, there are some exceptions especially when the preceding noun comes in a prepositional phrase.
let me know if this makes sense