He _______ seen the warning sign; that’s why he kept ... | GrammarQuiz.net

Topics: Modal Verbs

He _______ seen the warning sign; that’s why he kept going.

A. could have

B. should have

C. must have

D. might have

Select your answer:

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Simple Past Future Tense Adverbs of Frequency & Simple Present Tense First and Second Conditional Present Progressive Past Perfect or Past Perfect Continuous Simple Present & Present Progressive Aspect or tenses of Verbs Verb Tense, Pronouns and Antecedents Verb Tenses and Usage Passive and Active Sentences

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