[ Modal Verbs ]
He’s not answering his phone. He _______ be busy.
A. must
B. can
C. should
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Linking Words and ConjunctionVerb Present Simple TenseFinite and Non-Finite VerbParts of SpeechPresent Simple vs Present ContinuousVerbal Tensesas...as, comparatives, superlativesArticles A and AnModalNounsOther quiz:
Correlative Conjunction › ViewJohn is … smart and fun … his older sister
A. as … as
B. both … and
C. either … or
D. neither … nor
Modals and Responsibilities › View
You ___ wear a helmet while riding a bike.
A. must
B. need to
C. have to
D. responsible for