[ Tenses ]
He ______ in the library for hours before his friends joined him.
A. studied
B. had studied
C. had been studying
D. will study

Random Topics:
HomophonesPast SimpleNeither/Either/All/NoneGiving and Asking for AbilityVocabulary & GrammarGrammar: is/are/was/wereand, so, but, becauseTime and CalendarPast Tense vs Present Perfect TenseSimple Present TenseOther quiz:
Grammar › View“We are going to the beach this weekend,” they said.
A. They said that they were going to the beach this weekend
B. They said that they are going to the beach this weekend
C. They said that they will go to the beach this weekend
Grammar › View
She can _____ martial arts.
A. do
B. play
C. ride
Grammar › ViewYou ________ computer games! You should go outside more!
A. always played
B. have always played
C. are always playing
D. were always playing
Grammar › View
Identify the modal in the sentence: “You should finish your homework.”
A. You
B. Should
C. Finish
D. Homework
