[ Grammar ]
The dinosaurs —- for millions of years before humans appeared on Earth.
A. have been extinct
B. had been extinct
C. were extinct
D. are extinct

Random Topics:
Collective NounsGerund and InfinitiveConjunctions, Interjections and DeterminersProgressive Verb TensesGrammar (either..or.. and neither..nor..)Coordinating ConjunctionsRelative Pronouns and AdverbsAdjective or AdverbFuture or PastVerb TenseOther quiz:
Mixed General Quiz › ViewBoth basketball and hockey _____ first played in Canada.
a. are
b. were
c. was
Adverbs of Frequency & Simple Present Tense › View
I don’t _____ play the violin, but I love playing the piano.
A. often
B. never
C. seldom
Grammar › ViewThe book, _________ I read, was very satisfying.
A. which
B. who
C. where
Grammar › View
If I hadn’t been sick, he ______ out with me at the party.
A. goes
B. would go
C. went
D. would have gone
