[ Past Tenses ]
Helen was feeling very tired when she finished because she ___ all day.
A. had been studying
B. had studied
C. was studying
D. studied

Random Topics:
Vocabulary, Adjective & PrepositionAuxiliary ModalGrammar - too & enoughPossessive NounsTenses and ArticleRelative & ModalsHave to-ed or -ingGrammar - Present and Past PassiveInfinitive and GerundOther quiz:
Conjunctions › ViewIs your cat black _____ white?
A. and
B. but
C. because
D. or
E. so
Verbal Tenses › View
I can no longer tolerate this injustice
A. present continuous
B. present simple
C. present perfect
Grammar › View ___you___go home after our English class?
A. Are/are
B. Do/will
C. Are/going to
Relative Clause › View
Mary Rogers, …………….. new book I have just finished reading, is a famous writer.
A. who
B. that
C. whom
D. whose