Select your answer:

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Verb Tenses and ModalsModal Verbs and PermissionSentence Types and Conjunctions-ing / InfinitiveVerbal PhrasesConditionals and Modals of ProbabilityPresent simple, Present continuous, Singular, PluralGrammar - ConnectorsCan vs CouldPresent Perfect & Past Simple TenseOther quiz:
Grammar and Vocabulary › ViewThere is oxygen and nitrogen in the air.
A. science
B. technology
C. geography
Modals › View
You ____ stay up so late. You have school tomorrow.
A. needn’t
B. couldn’t
C. mustn’t
