[ Grammar ]
You ___ speak loudly in the library.
A. mustn’t
B. can
C. should
D. might

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Comparative AdjectivesGerundPunctuationGrammar ModalsTenses and Figurative LanguagePresent Simple vs Present ContinuousGrammar (was, were, could, could not)To Infinitive/Bare Infinitive/GerundsPerfect and Past TenseGerund & InfinitivesOther quiz:
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He left an hour ……………
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