[ Vocabulary and Grammar ]
Astronomers haven’t _______ signs of life in space.
A. see
B. saw
C. seen
Select your answer:
Random Topics:
Simple Past TenseMany vs. MuchDefinitions, Synonyms Grammar ( going to)Grammar Present Perfect (ever never)Grammar speak,talk,say,tellAdjectiveSimple Past vs Past Continuous TenseConditionals (0 - 1 - 2)
Other quiz:
Auxiliary Verbs › ViewAnisah and her family ___ eat together every night.
A. does
B. do
Question Tags › View
Mukesh sings well,…………?
A. didn’t he
B. doesn’t he
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