Hi duongthang,duongthang wrote:Kovinsky, thank, and please, help me moreStuart Kovinsky wrote:Hi all!khojason wrote:In 1994 the white house named Dr Ruth R. Faden chairperson of the federal advisory committee of experts they assigned to do a report on the history and ethics of the government’s radiation experiments on humans in the 1950’s and 1960’s.
A. they assigned to do
B. to be assigned doing
C. that was being assigned doing
D. assigned for doing
E. it assigned to do
E is definitely the best choice. While "it" is technically ambiguous (both the White House and the Federal Advisory Committee of experts are possible antecedents), none of the other choices provide a better alternative. Remember, while the GMAT prefers non-ambiguous references, if the reference is clear from the context of the sentence then seemingly ambiguous references aren't considered ambiguous.
Since the White House "named", parallelism dictates that the White House also "assigned", making "it" non-ambiguous.
Idiomatically we can "do a report", so (E) is also the idiomatic winner. "assigned for doing a report" will never be correct on the GMAT (as an aside, "assigned to do a report" without the "it" would be fine and arguably superior to (E)).
you said that when we have to choose between FOR DOING and TO DO, TO DO is correct by standard of gmat grammar, not by standard of general grammar. in the general grammar book this matter is never mention. Is that right?. I see in many questions in OG books, TO DO is perfered to FOR DOING.
is my thinking correct? Kovinsky.
"to do" is used for showing intention and in GMAT normally ing form is not preferred
