[ 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:
as...as, comparatives, superlatives › ViewThe house overthere is _______ building in the city.
A. the oldest
B. the eldest
C. as old as
Continuous Tenses › View
What is the correct structure for forming a past continuous tense?
A. Subject + am/is/are + verb(-ing)
B. Subject + was/were + verb(-ing)
C. Subject + will be + verb(-ing)
D. Subject + verb + -ed
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