[ Adverbial Clause ]
He stayed behind _____ he could help clean up.
A. in case
B. unless
C. so that
D. while

Random Topics:
Intermediate PrepositionsProverbsIrregular verbsGrammar - First ConditionalSimple Present and Present ContinuosGrammar: Reported QuestionsZero & First ConditionalIrregular AdjectivesAdverbs of TimeGrammar and VocabularyOther quiz:
Present Tenses › ViewAre you _______ (to paint) the house right now?
A. paint
B. paints
C. painting
D. is painting
Grammar › View
With his earnings he built his ______ home.
A. taste
B. dream
C. treasure