You _____ _______ on the door but I was not at home.
A. were knocking
B. was knocking
C. knock ing

Random Topics:
Grammar - Sentence StructureSentence Structure and Verb TensesToeic VerbEs and SModal Verbs of Deduction and SpeculationAdverbs & to beActive Voice-Present tenseContrastive ConjunctionVerb BESuperlative AdjectivesOther quiz:
Future Tenses › ViewMatch the sentence with the correct situation:
I will do a course in journalism!
A. a timetable or scheduled event
B. a prediction based on our opinion or intuition
C. a plan or decision made at the time of speaking
D. a personal arrangement or fixed plan
E. when there is evidence that something is going to happen
Reporting Verbs › View
“Would you like me to give you a lift to the station?” said Harry. (offer)
A. Harry offered to give me a lift to the station.
B. Harry offered giving me a lift to the station.
Grammar › ViewOn a night …
there was a big thunderstorm, the friends decided to tell each other frightening stories.
A. when
B. who
C. where
D. which
Relative Pronouns › View
Mary is the person … is very kind.
A. who
B. which
C. whom
D. whose
