[ Grammar ]
When my friend ________, I ________ an exercise.
A. was coming/ had been doing
B. came/ was doing
C. was coming/ has been doing
D. came/ had been doing

Random Topics:
Simple vs Present Continuous TensesConditionals III - Mixed 1st, 2nd & 3rd ConditionalsAdjective / Noun + to InfinitiveModal Verbs of ObligationGrammar speak,talk,say,tellComparative AdverbsNarrative, Past TensesGrammar: Defining Relative ClausesFuture or PastFuture Tense VerbOther quiz:
Grammar › ViewIf I had paid attention during the lesson, I _________ have answered this question correctly.
A. answer
B. will answer
C. will have answered
D. would have answered
Grammar › View
I could not find him. He was hiding … the door.
A. under
B. on
C. behind
D. between
You … smoke in any public building. It is prohibited by law.
A. don’t have to
B. mustn’t
C. both are correct
Grammar › View
Cousteau founded the nonprofit Cousteau Society _________________ encourage the protection of the sea.
A. because of
B. because of the fact that
C. in order to
D. thus
