[ Adverb Clause ]
__________ the pressure inside increases beyond a certain point, volcanoes can erupt violently
A. before
B. until
C. when
D. unless

Random Topics:
Passive VoicesProgressive Verb Tensestoo / enoughSubject, Object, Possessive Pronoun and Possessive AdjectivesSimple Present - WH QuestionsPresent Tenses and VocabularyRelative Clauses with who and whichModal and Phrasal VerbsPassive Modals in Different TensesUse of Prepositions or ConjunctionsOther quiz:
Comparatives or Superlatives › ViewSHARKS ARE THE _________________________ ANIMAL
A. MOST DANGEROUS
B. DANGEROUS
C. MORE DANGEROUS
D. DANGEOUR MOST
Coordinating Conjunctions › View
He wants to study medicine _____ become a doctor, _____ he wants to help people.
A. but, and
B. or, yet
C. so, nor
D. and, for
Verb Tenses › ViewShe ……… to South America next week.
A. will have gone
B. is going
C. go
D. went
Will or Going to › View
You have decided to sell your car. You tell a friend of yours.
You say: I don’t need my car any more. it. __________ (I/sell)
___
A. I’ll sell it.
B. I’m going to sell
