known TO BE
known AS
both are CORRECT
first pick the modifier issue of Mars--modified by what/whom?
you can eliminate BC
D & E have wrong IDIOM

PAB2706 wrote:14. It may be another fifteen years before spacecrafts from Earth again venture to Mars, a planet now known to be cold, dry, and probably lifeless.

(A) again venture to Mars, a planet now known to be

(B) venture to Mars again, a planet now known for being

(C) will venture to Mars again, a planet now known as being

(D) venture again to Mars, a planet that is known now to be

(E) will again venture to Mars, a planet now known as being

OA A

Pls explain yours answers.

Being cold, dark..... error, so eliminate B,C E
We are left with A D

(D) venture again to Mars, a planet that is known now to be so D is out

(A) again venture to Mars, a planet now known to be : sounds the best answer, though ..'earth venture again' in D sounds better than 'earth again venture' in A

I think all the versions of known are correct. I am not sure about GMAT english. We cannot just eliminate being as wordy because GMAT do have questions with being as the answers.


This is how I eliminate the answers -


(A) again venture to Mars, a planet now known to be

(B) venture to Mars again, a planet now known for being
"again" is an adverb and should modify venture (verb).

(C) will venture to Mars again, a planet now known as being

Will" in C and E brings in certainty but main clause has a "may be"

(D) venture again to Mars, a planet that is known now to be
Modifier and wrong usage

(E) will again venture to Mars, a planet now known as being ..Same as C.

I Am not satisfied with explanation for D... Pls elucidate on this

The "known now to be" is a wrong usage.

I will choose A

B C E will be eliminate because of "being cold"
D has "know now to be" it is not idiomatic

Quick tip--- Being is never right on the GMAT