[ Adverb Clause ]
__________ the pressure inside increases beyond a certain point, volcanoes can erupt violently
A. before
B. until
C. when
D. unless
Select your answer:
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Other quiz:
Grammar › ViewWe watched TV the whole evening ______ we had nothing better to do .
A. Since
B. Although
C. In order that
D. Despite
Grammar › View
My dad…………………………………. me to school every day.
A. drive
B. drives
C. is driving
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