Topics: Past Tenses
They __________ (debug) for two hours before they found the error.
A. debugged
B. had debugged
C. were debugging
D. had been debugging
Select your answer:
Random Topics:
Word FormationModals of ObligationPerfect Tenses and Have GotModal Verbs and Contrastive ConjunctionsIndependent ClausesModal Verbs of Certainty and PossibilityTenses - Present and PastApostrophes and GrammarIntermediate GrammarModals and ConditionalsOther quiz:
Grammar › ViewWe prepared some food for our picnic.
A. Some food was prepared for our picnic by us.
B. Some food were prepared for our picnic by us.
C. Our picnic was prepared by us by some food.
Vocabulary › View
The senator made a lot of _________ during his campaign.
A. Reason
B. Values
C. Judge
D. Trunk
E. Promises