[ Verb Tenses ]
Use a time expression with past perfect continuous tense.
A. had been studying
B. had been studyinged
C. had studying
D. had been study
Select your answer:

Random Topics:
Articles & PrepositionGrammar (was, were, could, could not)Adverb and Sentence StructureVerb-ing and InfinitiveInfinitiveGrammar-Translation MethodGerunds as objects of prepositionUncountable NounsOpinion / AgreementFuture - Will and Be going toOther quiz:
Grammar › View“What __________ if you lost your job?” “I’d find a new job.”
A. have you done
B. would you do
C. will you do
D. are you going to do
Vocabulary › View
Able to be depended upon; Trustworthy
A. minimum
B. reliable
C. advise
D. penalize
