Which one is the correct answer?
A. Did your friend explore the country in his twenties?
B. Had your friend been exploring the country in his twenties?
C. Had he exploring the country in his twenties?
D. Did your friend explored the country in his twenties?

Random Topics:
Can vs be able toModals and Comparative SuperlativeVerbs and AdverbsWord FormationGerunds and TensesComparative - SuperlativeSimple Verb TensesVerbs of movementAuxiliary VerbsLinking Verbs & Helping VerbsOther quiz:
Active and Passive Voice › ViewThe President ……………………. about the coup in Central America. (JUST INFORM)
A. were just informed
B. has just been informed
C. have been informed
Mixed Present Tenses › View
Justin …………………………………..(write, currently) a book about his adventures in Tibet.
A. is currently writing
B. has currently written
C. has currently wrote
D. currently writes
Passive Voice › ViewMany accidents … by dangerous driving.
A. is caused
B. is being caused
C. are caused
D. caused
Grammar › View
The ____ were given an order by their superior to maintain peace and order.
A. Policeman
B. Policemen
C. Policemans
D. Policemens
