When Carol _________ dinner, someone __________ on the door. ...

Topics: Tenses

When Carol _________ dinner, someone __________ on the door.

A. was cooking/ was knocking

B. was cooking/ knocked

C. cooked/ knocked

D. cooked/ was knocking

Select your answer:

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Modals and Vocabulary Modals for Necessity and Suggestions Compliment, Congratulation, and Hope Adverbial Clauses of Reason / Cause Grammar - Nouns, Verbs, and Adjectives Present Simple/Affirmative Idiom and Tenses Auxiliary Verbs (be, do, have)Has Got & Have Got Future Perfect Continuous

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