[ Past Tenses ]
They __________ (debug) for two hours before they found the error.
A. debugged
B. had debugged
C. were debugging
D. had been debugging
Random Topics:
Simple, Compound, Complex SentencesPlaces in TownContractions and ConjunctionsPersonal PronounsClauses and ConjunctionRelative Clauses & Real ConditionalsPresent Perfect vs Past SimpleAsking & Giving OpinionCountable QuantifiersWho am I?Other quiz:
Grammar › ViewThe mother ______ her son to school.
A. cent
B. sent
Grammar › View
By 2030, we ____________ from university.
A. will graduated
B. will be graduating
C. will have graduated
Grammar › ViewWhat is the positive degree of ( Taller ) ?
A. most tall
B. more tall
C. tallest
D. tall
Modal Verbs › View
The noise from the trains __________ me terribly last night.
A. was annoyed
B. annoyed
C. has annoyed
D. had annoyed