Devlikes
Hello Mike,
I am a premium
magoosh subscriber and this question came up in one of my
Magoosh practice sets.
I do have a few doubts related to this question and it would be really awesome if you could help me with it:
1.) Aid in/Aid to: As per the
Magoosh idioms flashcard, I have understood that if someone gives aid and it helps in an action, the correct idiom is "aid in [gerund]." The word "aid" never takes an infinitive (E.g Aid in planning, Aid in distributing, Aid in making, etc). But here in this particluar sentence, I thought that "aid" is not helping in an action as it was used before a noun (weight loss). I also googled "Weight loss" just to make sure and even there it showed "weight loss" to be a noun. This lead me to mistakenly consider option E as the correct choice.
My Doubt: is
"Aid in" + Noun can be idiomatically considered correct ? Also when do we use "Aid to" ?
2.) I also made a mistake in considering "it" in option E as a placeholder "it". But I was wrong in doing so as Chris Lele clearly explained that "It" was illogically referring to "weight loss".
In order to avoid such mistakes in the future, can you please suggest me how to recognize placeholder "it" on the GMAT. Would really appreciate your response !

Thanks,
Devansh
Dear
Devansh,
I'm happy to respond.
I think you may be slightly misinterpreting what was said in the flashcards, or perhaps we didn't say it clearly enough. It's absolutely true that "
aid" does not take an infinitive. The correct idiom is "
aid in." It's true that the object of the preposition is often a gerund, but it also can be a noun----typically the noun form of some action or activity.
an aid in GMAT success
an aid in economic recovery
an aid in physical fitnessHere, of course "
weight loss" is a noun, the noun form of a process that involves activity and effort. The construct "
aid in weight loss" is perfectly correct and in fact is relatively common in American advertising.
As for the placeholder "it," a.k.a. the empty "it," here's a blog you may find helpful.
The Empty ‘It’ on the GMAT Sentence CorrectionSome important tips for recognizing the placeholder "it."
Rule #1: More than 95% of the time, the verb following it is a form of the verb "
to be." When the empty "it" appears on the GMAT, the verb immediately after it is a "
to be" verb. Sometimes it followed by a feeling verb or something related to thought or emotion:
It seems strange that A is B.
It excites me to do X.
It bothers me that A is B.
It makes me feel important to do X.Since those constructions, by their very nature, typically discuss personal emotional states, they are unlikely as topics on the GMAT. The empty "it" is NEVER followed by an action verb. Here the verb is "
can ... lead," which is an action verb: a dead giveaway that the "
it" is NOT an empty "it."
Rule #2: when the empty "it" appears before the verb, the real subject is either an infinitive or a "
that"-clause following the verb. If there is not an infinitive or "
that"-clause following the verb, then the "
it" cannot possibly be an empty "it." In (E), we have
. . .
it can also lead to ketosis, . . .
Ignore any modifier after the comma. This is a complete clause right here, and there's no infinite and no "
that"-clause to be found. This absolutely cannot be an empty "it."
If you hang on to these two rules, it will be very easy to eliminate most false positives for the empty "it."
Does all this make sense?
Mike