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"comapred with/to" and "as compared with /to" are phrases working as prepositions. they are not do-ed phrases such as "tired of learning math".
so, we can accept choice c easily

by vietnam47

Thu Aug 22, 2019 8:09 am
Forum: Sentence Correction
Topic: CEO
Replies: 25
Views: 3819

Soaring television costs accounted for more than half the spending in the presidential campaign of 1992, a greater proportion than it was in any previous election. A. a greater proportion than it was B. a greater proportion than C. a greater proportion than they have been D. which is greater than w...

by vietnam47

Thu Aug 22, 2019 7:45 am
Forum: Sentence Correction
Topic: Soaring television costs
Replies: 7
Views: 1137

"as well as" can work as a preposition that go with doing in the pattern
main clause+comma+doing
question " burning less gasoline, as well as less" in gmatprep show this point, pls, google to find it.

so, it is no problem with "being differnt" in choice A and B
but it is wordy and inferior.

by vietnam47

Wed Aug 21, 2019 2:51 am
Forum: Sentence Correction
Topic: GMAT OG 2019 Because many of Australia’s marsupials,
Replies: 5
Views: 1356

The personal income tax did not become permanent in the United States until the First World War;before that time the federal government was dependent on tariffs to be their main source of revenue . A)the federal government was dependent on tariffs to be their main source of revenue B)the federal go...

by vietnam47

Wed Aug 21, 2019 2:35 am
Forum: Sentence Correction
Topic: OG Question-The personal income tax did not become
Replies: 9
Views: 6954

Long overshadowed by the Maya and Aztec civilizations, historians are now exploring the more ancient Olmec culture for the legacy it had for succeeding Mesoamerican societies. (A) historians are now exploring the more ancient Olmec culture for the legacy it had for succeeding Mesoamerican societies...

by vietnam47

Wed Aug 21, 2019 2:13 am
Forum: Sentence Correction
Topic: OG VR 18 : Long overshadowed by the Maya and Aztec
Replies: 2
Views: 1423

Over the past ten years cultivated sunflowers have become a major commercial crop, second only to soybeans as a source of vegetable oil. A. second only to soybeans as a source of vegetable oil B. second in importance to soybeans only as a source of vegetable oil C. being second in importance only t...

by vietnam47

Wed Aug 21, 2019 12:08 am
Forum: Sentence Correction
Topic: GMAT Official Guide 2019 Over the past ten years
Replies: 3
Views: 2702

According to some botanists, invasive plants are the second most serious threat, after habitat loss, to native species of plants and animals and to the maintenance of biologically diverse ecosystems . A. threat, after habitat loss, to native species of plants and animals and to the maintenance of b...

by vietnam47

Tue Aug 20, 2019 8:41 pm
Forum: Sentence Correction
Topic: GPREP 3 SC-9
Replies: 4
Views: 2243

regarding A and B
achieving is similar to achievement. so, problem can not be achievement logically. " the problem is how to achieve " is logical

my problem is the victory on gmat
this is non logical similarly.

by vietnam47

Tue Aug 20, 2019 6:31 am
Forum: Sentence Correction
Topic: The most vexing problem faced by researchers...
Replies: 4
Views: 4053

when "it" is at the end of the sentence, or at the end of long phrase, "it" can be wrong because pronoun refer to a noun in preceding phrase/clause , and normally there are many nouns in preceding clause. so, if you do not parallelism to make pronoun clear, pronoun at the end of clause normally wron...

by vietnam47

Mon Aug 19, 2019 8:51 am
Forum: Sentence Correction
Topic: OG question-help
Replies: 12
Views: 8535

In virtually all types of tissue in every animal species, dioxin induces the production of enzymes that are the organism�s trying to metabolize, or render harmless, the chemical that is irritating it . (A) trying to metabolize, or render harmless, the chemical that is irritating it (B) trying tha...

by vietnam47

Mon Aug 19, 2019 8:20 am
Forum: Sentence Correction
Topic: OG question-help
Replies: 12
Views: 8535

'appear that" happen only in the clause in which the subject is fake "it".
it appears that he is a rich man
"it" is fake subject.
He appear that he is a rich man. this is not grammatical.

by vietnam47

Mon Aug 19, 2019 5:34 am
Forum: Sentence Correction
Topic: OG - After suffering $2 billion
Replies: 3
Views: 2068

So Gmat Guru , a pronoun could only refer to a noun that precedes and not a noun that comes after it Generally, a pronoun refers to a noun that precedes it. If there is no preceding noun, a pronoun may refer to a noun that follows, as in Q7 in the OG12: As its sales of computer products have surpas...

by vietnam47

Mon Aug 19, 2019 12:27 am
Forum: Sentence Correction
Topic: Affording strategic proximity to the Strait of Gibraltar
Replies: 46
Views: 19394

(E) In an area devoid of volcanic activity, a team of scientists from the University of California has made the discovery of a fragment of the Swiss Alps that had seemingly come from a depth as far as 415 miles. 1. Is the Past Perfect of " Had come " correctly used in this sentence? 2. Is "from a d...

by vietnam47

Sun Aug 18, 2019 11:04 pm
Forum: Sentence Correction
Topic: In an area devoid of volcanic activity
Replies: 7
Views: 2923

we are here not to ask about source of the question. if the experts think a question is not worth studying, say so. even normal person can say so.
we focus on official questions and other good questions. if we feel a question is not good, go to another question and dont waiste out time.

by vietnam47

Sun Aug 18, 2019 8:05 pm
Forum: Sentence Correction
Topic: Hard_SC#001
Replies: 13
Views: 5179

Dolphins lack vocal cords, nevertheless creating sounds: a complicated system of whistles, Squeaks, moans, trills, and clicks are produced by sphincter muscles inside the blowhole. A. nevertheless creating sounds: a complicated system of whistles, squeaks, moans, trills, and clicks are produced by ...

by vietnam47

Sun Aug 18, 2019 8:05 am
Forum: Sentence Correction
Topic: Dolphins
Replies: 8
Views: 5783