[ Past Perfect and Past Perfect Continuous Tense ]
Mary ________ sad because I _________________ her birthday.
A. was…have forgotten
B. had been…forgot
C. was…had forgotten

Random Topics:
Grammar PhrasesClause Markers TOEFL GrammarVerb BETransition WordsTenseIntensifiers: Really vs VeryAdverbs of Manner, Likes and PreferencesIF CLAUSEAdverbial ClauseVerbs and TensesOther quiz:
Expressing Obligation and Modals › ViewYou …. cheat in a test.
A. must
B. mustn’t
Modal Verbs › View
Tony ____ a university lecturer; he’s too young.
A. must be
B. mustn’t be
C. can’t be
D. shouldn’t be
Mixed General Quiz › ViewHe was a ___ enough fellow even if he was not wealthy.
a. decent
b. descent
c. dissent
Grammar › View
I’ve never ____________ to the USA.
A. gone
B. being
C. going
D. been
