They _______ seen the sign; it was right in front ... | GrammarQuiz.net

Topics: Modal Verbs

They _______ seen the sign; it was right in front of them.

A. might have

B. must have

C. could have

D. may have

Select your answer:

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Modal Auxiliaries and Similar Expressions Modals for Advice, Obligation/Prohibition, Necessity and Lack of Necessity Adjectives and Prepositions Simple Present Continuous Tense Grammar: Syntax Grammar Errors Present Continous Tense Parallelism and Subject Verb Agreement Adverbs by Type Adverbs of Degree

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