Select the correct option: Their approach proved ___ effective that competitors quickly emulated it.
so
The sentence uses a result clause introduced by "that" ("effective that competitors quickly emulated it"), which requires the correlative pair "so...that" to express cause and result.
"So" fits before the adjective "effective" to set up the result clause that follows, forming the standard "so + adjective + that" structure.
"Too" pairs with "to" rather than "that" to show an excessive degree preventing an action, "as" is used in comparisons of equality, and "very" does not take a following "that" clause of result, so none of these fit the given sentence structure.
Hence, the answer is so.
Similar Questions
Select the correct option:
Hardly had the meeting begun ___ the auditors demanded additional documentation.
Select the correct option:
The researcher was criticized not for what she published but ___ she chose to omit.
Important Questions from Sentence Completion
Select the most appropriate ANTONYM of the given word.
ForbiddenSelect the most appropriate option to fill in the blank.
The perfume she uses has a strong _________.Select the most appropriate option to fill in the blank.
The company's _________ commitment to sustainability is admirable.Select the most appropriate option to fill in the blank.
Rosy and Nicky couldn’t provide any evidence to support _______ arguments.Select the most appropriate homonyms from the given alternatives to fill in the blanks.
The rowing instructor commanded them to _______ in a _______.
A. row
B. roe
C. row (sequence)
