A huge flying reptile that died out with the dinosaurs some 65 million years ago, the Quetzalcoatlus had a wingspan of 36 feet, _____ the largest flying creature the world has ever seen.

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English Sentence Correction QUESTION #4897

Question 1

believed to be
and that is believed to be
and it is believed to have been✔️
which was, it is believed,

Correct Answer Explanation

It is believed to have been' uses the perfect infinitive 'to have been' to correctly reference a past state, consistent with the creature being extinct. Option A lacks a conjunction. Option B uses present tense incorrectly for an extinct creature. Option D is structurally awkward and incomplete.

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