[ Grammar ]
Recently, a new vaccine against measles __________.
A. has been developed
B. had been developed
C. had developed
D. was developing
Select your answer:
Random Topics:
Loose vs. LoseI vs. MeToo / Very / SoActive & PassivePast Perfect TensePast Perfect Simple & Past Perfect ContinuousDescribing WordsAsking & Giving OpinionRegular Plural Nouns
Other quiz:
Grammar › ViewAustralia _________ one of the most fascinating countries on Earth.
A. is
B. are
C. was
D. were
Modals › View
He ——-be at least sixty
A. need to
B. ought to
C. must
How to use : Read the question carefully, then select one of the answers button.