But there are some researchers who claim that the area ...

[ Grammar ]

But there are some researchers who claim that the area ___ by a meteorite.
A. couldn’t have been hit
B. couldn’t have been hitted
C. couldn’t have hit
D. couldn’t have been hut

Select your answer:

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Possessive Nouns Relative Clause Phrasal Verbs and Verb Forms No Excuse Words / Conjunction SO Grammar - Present and Past Passive Simple Compound and Complex Sentences Linkers and Conjunctions Used to - Would - Tenses Subordinating Conjunctions and Clauses Simple Verb Tenses

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A. told

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