[ Grammar ]
Some say the light bulb was the most significant ____ in history.
A. innovation
B. inspiration
C. implication
D. instigation

Random Topics:
Perfect ModalsVerb AbilityArticles and DemonstrativesVerbsPresent/Past/Past ParticpleTime ClauseGrammar Double Object VerbsDo not- Does notAdverbial Clause of ConcessionPhrasal VerbOther quiz:
Tenses › ViewHis ____ has been growing over the years.
A. wealth
B. wealthy
C. welth
D. wealths
Present Tense › View
This book …… to my uncle.
A. is belonged
B. is belonging
C. belongs
D. belong
Grammar › ViewThis tea is …………………….. hot to drink.
A. enough
B. too
C. these
D. those
Grammar › View
Jane______the floor at the moment.
A. mops
B. mop
C. is mopping