[ Tenses ]
Choose the correct form of the verb from parentheses. When I heard the knock on the door, I (opened / was opening) it.
A. opened
B. was opening

Random Topics:
Past Narrative TensesVocabulary and GrammarTag QuestionPast form of ModalsAdverbs and Time ExpressionsPassive Voice Active VoiceGerunds and ModalsIN, ON & ATPassive and Active SentencesMesopotamia VocabularyOther quiz:
Grammar › ViewI detested ___________ (spend) two hours every day travelling to work and back
A. to spend
B. spending
C. both “spending” and “to spend”
D. to spending
Grammar › View
My father _____ me with my homework when he has time.
A. helps
B. is helping
C. helped
D. help