[ Adverb Clauses ]
He couldn’t go to the party __________ he had to study for the exam.
A. unless
B. after
C. as
D. before

Random Topics:
Demonstrative Pronouns and Verb TensesArticles and DeterminersSubject-Verb AgreementSimple Past/Past ProgressiveConditionals and Modal VerbsPassive Voice in Past Simple TenseSimple PresentPresent TenseClauses of ReasonSuperlative AdjectivesOther quiz:
Articles › View_______ tiger is _______ ferocious animal.
A. a, a
B. a, the
C. the, a
D. the, the
Future Tenses › View
What ______at 11 o´clock tonight?
A. will you have done
B. have you been done
C. will you be doing
D. will you have been doing
Sentence Structure › ViewThe rain forest is disappearing, _______ many of its plants and animals are disappearing too.
A. but
B. and
C. or
Grammar › View
The driver __ the cat and tried to avoid it.
A. saw
B. was seeing
