[ Grammar and Vocabulary ]
How long ______________ studying food processing techniques for the company when he retired?
A. did Martin work
B. had Martin worked
C. had Martin been working
Select your answer:
Random Topics:
Clauses and ConjunctionsPast TenseShould and Shouldn'tTo Infinitive or Bare InfinitiveVocab CheckingModal VerbModal Auxiliaries and Similar ExpressionsTo Infinitive/Bare Infinitive/GerundsGerund or InfinitivesPast Perfect TensesOther quiz:
Present Perfect Simple vs Continuous › ViewHe __________ (not finish) his homework yet.
A. has not finished
B. has not been finishing
Grammar › View
. You haven’t seen this film, ________?
A. have you
B. haven’t you
C. did you
D. didn’t you