[ 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:
Conjunction › ViewYou had better hurry ____ you’ll be late for work.
A. for
B. yet
C. and
D. or
Grammar › View
Gerund or infinitive. Choose the correct answer:
`I´m sorry! I´m late!! Do you mind ……for me?
A. waiting
B. to wait
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