[ Past Continuous Tense ]
We ……… in the classroom, when the headmaster entered
A. have all been sitting
B. don’t sit
C. were all sitting
D. are all sitting

Random Topics:
Pronoun-Verb AgreementPresent Simple for Future ArrangementOffering HelpReported speech (statements)Adverb ClauseCan vs be able toTransportation VocabularyCommunicative GrammarArgumentative VocabularyGrammar (was, were, could, could not)Other quiz:
Grammar and Vocabulary › ViewA: Is your husband here?
B: Yes. ________ husband is over there.
A. Our
B. Your
C. My
Prepositions › View
My father always has a shower __________ the morning.
A. in
B. on
C. at
D. under
Grammar › ViewThis summer I ___________ travel to Spain with my friends.
A. am going to
B. will
Grammar › View
You had better ………… a doctor about that bad cough.
A. to see
B. see
C. seeing
D. to seeing