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:
Second Type ConditionalSimple and Past TensesUnreal Uses of Past TensesAdjective ClausesPrepositions and Preposition PhrasesVerb AbilityContrast Linking WordsConjunction and Punctuation-Ing and Infinitive Verb PatternsParts of SpeechOther quiz:
Modals Posibility and Probability › Viewit’s possible that tomorrow ___________ (be) hotter than today
A. might be
B. will be
Grammar › View
He is writing _____
A. care
B. careful
C. carefully