[ Past Simple, Past Continuous, Past Perfect, Past Perfect Continuous ]
I heard a knock at the front door so I ____ to answer it.
A. went
B. was going
C. had gone
D. had been going

Random Topics:
Past Simple VerbsAdjectives and DegreesAdverb or AdjectiveSecond Type ConditionalPerfect TensesNounsModal RequestsAdverb ClauseAdverbs and Time ExpressionsRelative Clauses beginning with PrepositionsOther quiz:
Vocabulary › ViewWhat does “delight” mean?
A. An arrival
B. Wonderful
C. Happiness
D. To create, make more of
Simple vs Continuous Past Tense › View
Last night I____in bed when suddenly I______ scream
A. was reading-heard
B. was reading-was hearing
C. read-was hearing
D. read-heard