By the time I left, she __________ for more than an hour.
A. had been studying
B. studies
C. has been studying
D. was studying

Random Topics:
Ordering AdjectivesModals AuxiliaryQuantifiers MixGerund or to InfinitivePhrasal VerbsGerundPast Perfect vs Past SimpleGrammar - to be, possessive, have gotModal and Phrasal VerbsPast TensesOther quiz:
Grammar › ViewI liked the chocolate chip cookies better _______ oatmeal raisin. But _____ I tried the sugar cookies and those were my favorite.
A. then; than
B. than; then
C. then; then
Subordinating Conjunctions › View
Which is grammatically correct?
A. Elderly people can enjoy this chocolate whenever they want to eat something healthy but delicious.
B. Elderly people can enjoy this chocolate, whenever they want to eat something healthy but delicious.
C. Whenever elderly people want to eat something delicious they can enjoy this chocolate.
Grammar › ViewI …….. (buy) a new sweater last week.
A. buyyed
B. buyed
C. brought
D. bought
Grammar › View
Many farmers still use ……………… for plowing the field instead of tractors.
A. Ox
B. Oxes
C. Oxen
