[ Past Tenses ]
We were tired as we ________ for more than four hours.
A. walked
B. were walking
C. had walked
D. had been walking
Select your answer:

Random Topics:
Passive with ModalsGrammar - Wh QuestionsGrammar Pronoun and Singular Plural NounPhrases & ClausesGrammar : Must (Necessity)-ing form and the to-infinitiveAdverbial Concession ClausesWho or WhomPresent Simple and Present Continuous TenseTenses with Time ExpressionsOther quiz:
Modal Verbs › ViewShe ___ be the next president of the country. (can, could, might, will)
A. must
B. shall
C. could
D. can
Must Vs Have to › View
Choose the correct option.
A. We use must when we express personal obligation.
B. We use have to when we express personal obligation.
