[ Grammar ]
The sun was thought _____ a ball of fire in the past, but now it is known _____ a glowing sphere of gases.
A. to have been, to have been
B. to had been, to be
C. to be, to have been
D. to be, to be
Select your answer:
Random Topics:
Correlative ConjunctionSome vs. Any Each or EveryTag QuestionSimple TensesThe First Conditional (if/unless)Offer and SuggestionSimple Present ProgressiveZero & First Contidional
Other quiz:
Vocabulary › ViewWhat word means full of life or excitement?
A. animated
B. downright
C. upright
D. luster
Present Perfect › View
He has ______ a novel
A. write
B. wrote
C. written
How to use : Read the question carefully, then select one of the answers button.