[ Tenses ]
The Cambrian _____ an important moment in the history of life on earth and a time of radical evolutionary experimentation when many animals first _____ in the fossil record.
A. was / had appeared
B. has been / will appear
C. has been / appears
D. is / appeared
E. was / appeared
Select your answer:
Random Topics:
Nouns and Their FormsUncountable NounsPresent, Past and Future TenseGrammar (was, were, could, could not)Time Clauses of FuturePerfect and Past TensesPossessive Adjectives and Possessive PronounsIntensifiers: Really vs VeryTenses and FoodSimple PastOther quiz:
Tenses › ViewPeter __________ (leave) outside.
A. am leaving
B. is leaving
C. are leaving
Grammar and Vocabulary › View
Everybody ___ Mr. Jones. He is a respectable member of our community.
A. looks up to
B. looks up
C. looks down on
D. looks over