Idioglossia is a phenomenon, incompletely understood at best, where two persons develop a unique and private language with highly original vocabulary and syntax.
(A) where two persons develop a unique and private language with
(B) when two persons develop a unique and private language having
(C) in which two persons have unique and private language development with
(D) having two persons who develop a unique and private language that has
(E) in which two persons develop a unique and private language with

Distinguished architecture requires the expenditure of large sums of money, even if it is by no means certain that the expenditure of large sums of money produce distinguished architecture.
(A) even if it is by no means certain that the expenditure of large sums of money produce
(B) even if it is by no means certain that the expenditure of large sums of money will produce
(C) even though there is no certainty that the expenditure of money in large sums produces
(D) even though it is by no means certain that the expenditure of large sums of money produces
(E) though there is no certainty as to the expenditure of money in large sums producing

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1. E.. What's the problem with B.. use of when or use of having?
2. D.. I had a confusion between D and C.. I figured it out eventually when I noticed that expenditures of large sums of money ought to be used here as in non underlined part.. but I was wondering if there is error in using " there is no certainty" used in C instead of " it is by no means certain" used in D

Yes, " in which" is more idiomatic but still i wud say it is a tough one because i have seen lot of writers using when in such cases.. It becomes really challenging for us non native speakers when ETS tests on such minute distinctions.

I think since in the non underlined part says expenditure of large sums of money, we shud stick with that.. rest, Iam not sure...

expenditure of money in large sums - is awkward ( or unidiomatic )
expenditure of large sums of money - correct

hello,

I too selcted B but guess when a ''phenomenon'' is discussed it is treated as an ''entity'' N not as a ''time frame'' and that is why the use of in which '' suits better than the use of ''when''

entity= object or thing = in which

time frame= when

as for the second one I went wid D cos of two reasons: 1 always and always it is the best policy of ets to ''stick'' with the ''original'' part of the sentence when nothing else is better and hence '' by no means certain ..... expenditure of LARGE sums of money''

two: as some one already said '' expenditure of large sums of money '' is much better than ''expenditure of money ...''

also very minute aspect '' the use of certainity'' doe s not go well it is good to let the sentence flow in simple present and active voice and hence '' it is no means certain'' goes well...

hope that helps!
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the whole worldmakes way for the man who knows wer he's going... good luck