Topics: Adverb Clauses
He couldn’t go to the concert __________ he had to work.
A. if
B. until
C. unless
D. as
Select your answer:

Random Topics:
Tenses and PronounsPresent Continous TenseRelative PronounDefinite vs Zero Article Abstract NounsFamily VocabularyPast and Past ContinuousSentence Structure and Verb TensesPast Simple TenseComparison of Adjectives and AdverbsConjunctions and Sequence ConnectorsOther quiz:
Modals › ViewThis room is a mess, I really _____ find time to clean it!
A. don’t have to
B. have to
C. must
D. mustn’t
Grammar › View
Yogurt is a milk product.
A. Fact
B. Opinion
