[ Grammar ]
I _______ there once a long time ago and _______ back since.
A. was/ have not been
B. had been / was not
C. would be / had not been
D. have been / will not be

Random Topics:
Formal & Informal WordsPresent Perfect Simple and ContinuousModal Verbs for SpeculationConnectives (because, due to, owing to, because of)Noun, Pronoun, Adjective, VerbModals with Perfect InfinitiveIrregular Plural NounsTOEFL GrammarPast Tense and NeutralPast and Future TensesOther quiz:
Grammar › ViewWhere _________ you ___________ last Christmas holidays?
A. did…go
B. do…go
C. were…go
D. was…go
Sentence Structure and Grammar Rules › View
Fill in the blank: I have never been to Paris, and ___ has my best friend.
A. neither
B. either
C. also
D. too
Grammar › ViewIf we had started using solar energy earlier, the planet _________ now.
A. would be less polluted
B. would have been less polluted
C. would being less polluted
Tenses › View
I … my best friend since primary school.
A. has known
B. know
C. have known
D. knew
