Gmat prep question

[jc114]

Until quite recently, American presidents lived in a world in which the public and private realms of their lives were largely seperate, and the press cooperated in maintaining the distinction, and Americans judged national leaders without receiving, or expecting, intimate information about them.
A..
B. where the press cooperated in maintaining the distinction, and where
C. for the press cooperated to maintain the distinction and
D. the press cooperated to maintain the distinction, for
E. in which the press cooperated in maintaing the distinction, and in which

I choose B because where would relate to the "realms"..what about E? is "in which" appropriate??

People have discovered the principles of solar energy whenever fuel becomes scarce and expensive but will forget them every time a new source of cheap energy is developed.
A. ...
B. have discovered the principels of solar energy whenever fuel has become scarce and expensive but they forget
C.discovered the principles of solar energy every time fuel becomes scarce and expensive, forgetting
D. discover the principles of solar energy every time fuel became scarce and expensive, but they forget
E. discover the principles of solar energy whenever fuel becomes scarce and expensive but forget

==> is there a difference between "discovered" and "have discovered" (couldnt you use the present participle because people could have discovered from the past into the present?
Also,...if you add "they", after "but" so it becomes "but they forget" (like D), is it wrong?

[800GMAT]

I think you can answer both questions without difficulty if u
know the following constructions


Independent clause;Independent clause
Independent clause, coordinating conjunction Independent clause

(common coordinating conjunctions : and, but, or, so, yet)
Independent clauses stand alone as a sentence

I would chose D for both questions

[jaspetrovic]

I'd choose A for first and E for second.

What are the OA's?

[leo]

I'd choose A for first and B for second. Whats the OA's

[leo]

Sorry. I will select E for the second one.

[isisalaska]

1st sentence:

I choose B. This sentence refers to the topic where vs. which

where is used mainly for places while which is an adajetive. Examples:

The house where I grew up is for sale

The house which I like the most is the white one.

2nd. sentence:
I choose E since you need teh present tense here.

[alugoya]

i think E is correct choice for the first question
and D for the Second

[jc114]

i think i understand the reasonings...but the answer for both of them are E and E

[aim-wsc]

Until quite recently, American presidents lived in a world in which the public and private realms of their lives were largely seperate, and the press cooperated in maintaining the distinction, and Americans judged national leaders without receiving, or expecting, intimate information about them.
A..
B. where the press cooperated in maintaining the distinction, and where
C. for the press cooperated to maintain the distinction and
D. the press cooperated to maintain the distinction, for
E. in which the press cooperated in maintaing the distinction, and in which

and where
or
and in which
or such constructions are awkward unless they are making parallel sequence.
& in this case they are indeed making parallel sequence
So OK.

Tracing the list of things is what making this problem difficult.

The sentence says
American presidents live in a world in which:
---1) the public and private realms of their lives were largely seperate
--2) the press cooperated in maintaing the distinction
and
-- 3) Americans judged national leaders without receiving, or expecting, intimate information about them

since in which is used in non-underlined part you must use same construction in order to make it parallel and harmonious.

Hence E wins here.

[aim-wsc]

People have discovered the principles of solar energy whenever fuel becomes scarce and expensive but will forget them every time a new source of cheap energy is developed.
A. ...
B. have discovered the principels of solar energy whenever fuel has become scarce and expensive but they forget
C.discovered the principles of solar energy every time fuel becomes scarce and expensive, forgetting
D. discover the principles of solar energy every time fuel became scarce and expensive, but they forget
E. discover the principles of solar energy whenever fuel becomes scarce and expensive but forget

Simple present tense.
E. short and parallel.

for other options here we go:
A: have discovered..... but will forget ...... doesnt make parallel
B: People have..... but they forget....... again discard; they've .... was OK
C: need present tense> discard
D: OK but if compared with E, D is wordy.
People discover but forget

==> is there a difference between "discovered" and "have discovered" (couldnt you use the present participle because people could have discovered from the past into the present?
Also,...if you add "they", after "but" so it becomes "but they forget" (like D), is it wrong?

D is not wrong but is wordy or if compared with E it is not a better option.

for PP the statement has words like "every time / whenever... " therefore use simple present tense.

[Cybermusings]

I would have chosen D and E...but now I see why E is a correct choice in the first sentence

[prachipareekh]

For 1st question

E - maintaining parallelism - ...in which X and in which Y and in which Z

A - incorrect - violating parallelism - ... in which X, and Y, and Z.

B - incorrect - violating parallelism - ... in which X, where Y, and where Z.

C - incorrect - violating parallelism - ... in which X, for Y, and Z.

D - incorrect - violating parallelism - ... in which X, Y, for Z.

[prachipareekh]

2nd Ques

D - incorrect - wrong tense became - Make use of present tense -> 1. to state facts 2. to discuss one's own ideas 3. to discuss the ideas expressed by an author in a given work

[BTGmoderatorRO]

Answer
Option A.
'the press cooperated in maintaining the distinction, and '
This is the correct answer
Option B.
the press cooperated in maintaining the distinction, and where.
Option B is similar to option A but the use of 'where' makes it incorrect and unsuitable to be the answer.
The use of 'where' does not compliment the preceding sentence
Option C
'the press cooperated to maintain the distinction, and'
not 'to maintain' but 'to maintain'
Option D.
'the press cooperated to maintain the distinction, for'
incorrect sentence usage 'to maintaining' not 'to maintan'
Option E.
in which the press cooperated in maintaing the distinction, and in which
improper word usage maintaing not maintaing