bharatdasaka
If the Example of the below sentence is taken, I don't see the need of using "that" after the subjunctive mood created by the word Demand.
Eg: I Demand an explanation in written form by end of the day.
Thought this can be written as :
I demand that an explanation be given to me in written by end of the day, but this would become a passive construction which other wise is not recommended in gmat.
Any thoughts ??
Yes you are right passive constructions are less preferred if there is an active voice substitute and the thought can be expressed properly in active voice.
In the example that you mentioned above, the first one would be better than the second one because the first one is in active.
But if there is a need of subjunctive, then it should be used correctly.
"
I demand he speak properly." would be better than "
I demand that he speaks properly" because the first one uses the correct subjunctive construction.
However, if there are two sentence and the one with active voice is grammatically or contextually incorrect, then you must choose the passive construction which otherwise does not contain any other errors.
Hope it helps,
Vercules