[ Tenses ]
He ______ code for hours before he finally fixed the bug.
A. had been writing
B. used to write
C. wrote

Random Topics:
Action, Helping & Linking VerbsPaired ConjunctionWill & Be going toPhrasal VerbsVerb to havePast Simple VS Used toIntermediate PrepositionsAdjectives and AdverbsModals: Possibility, Necessity, ExpectationComperative and SuperlativeOther quiz:
Grammar › ViewBecause they are low-lying areas, plains can flood easily.
A. Complex
B. Not Complex
Grammar › View
She …………… coming to dinner tomorrow.
A. Will
B. Is
C. Shall
D. Can
You………………. apologise; it’s not necessary.
A. mustn’t
B. may not
C. don’t have to
D. doesn’t have to
Modal Verbs and Gender Nouns › View
She ___ sing very well when she was younger.
A. couldn’t
B. could
C. was
D. were
