one prep SC qquestion -- NN plz help

chamcham · 发表于 2007-6-24 15:55:00

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The key is A. Just wondering in E, does "they" have reference?

applec · 发表于 2007-6-24 17:37:00

they can be books or copies. no clear reference.

the key here is idiomatic: either X or Y. X and Y must be parellel. A is the only answer which fits the requirement. either "as X" or "Y" is not correct.

chamcham · 发表于 2007-6-24 17:49:00

that is true, but is it sometimes "be", "can", or prop could be omitted but still correct?

Please advise,

applec · 发表于 2007-6-24 22:52:00

it depends.

in here, "be" must stay since books cannot sell themselves!

GMAT usually uses "be" to test whether a comparison is necessary to have the "be".

Parellelism is vital.

if "be" is well known in the comparison, it can be removed.

for example.

Mary is happier than (is) Peter.

His book was sold more quickly than (was) mine.

chamcham · 发表于 2007-6-25 04:11:00

so in this case, should "either as electronic books or downloadable copies" be always considered wrong?

or it could be correct sometimes if no better option is available, since we could see it as "either as electronic books or (as) downloadable copies"?

one prep SC qquestion -- NN plz help

one prep SC qquestion -- NN plz help

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