Scientists think there ________ at least five mass extinctions in Earth’s history.
A. will be
C. have been
D. has been
Pronoun CasesDirect vs. Indirect SpeechIrregular VerbThings in EnglishOffering HelpMix-TensesFuture PassiveComparative and Superlative AdjectivesAuxiliary Words
Other quiz: Vocabulary
________ is poetry that doesn’t conform to a regular meter or rhyme scheme.
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