[ Modals and Responsibilities ]
You ___ take breaks while studying.
A. must
B. need to
C. ought to
D. responsible for
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Past and Future TensesCan vs CouldTypes of PrepositionDegrees of ComparisonVerb & GrammarConditionals and Modals of ProbabilityPresent Perfect and Past SimpleAdverbs, Infinitives, Definite ArticleConjunctive AdverbVocabulary Spelling GrammarOther quiz:
Grammar › ViewWhat is the verb in this sentence:
The ship sailed out into the ocean.
A. sailed
B. ship
C. ocean
D. out into
Vocabulary › View
the variety of life in the world or in a particular habitat or ecosystem
A. carbon dioxide
B. boreal
C. ecosystem
D. biodiversity