[ Grammar ]
The technology, _______ over several years, has revolutionized the industry.
A. developing
B. developed
C. develops
D. develop

Random Topics:
Grammar: so and suchContractions and ConjunctionsPunctuationsFamily Members and Present SimplePassive with ModalsPresent Perfect ContinuousProgessive TensesQuestion TagsGrammar (Adverbs, Prepositions, Prepositional Phrases)GerundOther quiz:
Relative Clauses › ViewThe extent ____the stock market is affected by the day-to-day pronouncements of the President of the United States is astonishing.
A. of which
B. to which
C. whose
D. where
E. when
Grammar › View
Identify the preposition.
Taylor built a tall tower with wooden blocks.
A. built
B. with
C. with wooden blocks
D. a
Correlative Conjunction & Complex Sentences › ViewThis car is so expensive, ….?
A. is it
B. isn’t it
C. aren’t you
D. aren’t I
Past Tenses › View
Marian … Mary two years ago.
A. has met
B. was meeting
C. met
