I ----- have forgotten to lock the front door last ...

[ Modals ]

I —– have forgotten to lock the front door last night; it is open now.

A. could

B. have to

C. should

D. must

E. can

Select your answer:

Random Topics:
Adverbial Clauses of Reason / Cause Past Tense and Past Continuous Comparisons Uncountable Nouns Modals and Conditionals Passive Voice Active Voice Modals and Past Tenses Grammar - First Conditional Adjective & Adverbs

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A. mention

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A. could

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