Grammar Quiz

[ Phrasal Verb ]

Flouride greatly helps ……………. tooth decay, so it’s commonly used in toothpaste.

A. prevent

B. cause

C. prolong

D. conclude

Select your answer:
         


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ComparisonGrammar: Adjectives & PrepositionsPast Simple and Past ProgressiveWill & Be going toGrammar / PronounsMesopotamia VocabularyModal Auxiliary VerbsModals for Necessity and SuggestionsAdverbs of How Something is Done

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