[ Tenses ]
By the time I left, she __________ for more than an hour.
A. had been studying
B. studies
C. has been studying
D. was studying
Select your answer:

Random Topics:
Verbs & AdverbsPunctuating ClausesModal Verbs for Speculation-ed or -ingAdjectives or AdverbsPrepositions and Prepositional PhrasesNarrative TensesVerb Present Simple TenseVerb + InfinitiveWorld Literature VocabularyOther quiz:
Grammar › ViewMost ____ like travelling.
A. of people
B. of the people
C. people
Modal Verb › View
_______ we meet at the cinema?
A. Shall
B. Must
C. Have to
D. Need