[ Modal Verbs ]
Passengers ___ stand up until the plane has completely stopped.
A. must
B. mustn’t
C. have to
D. don’t have to
Select your answer:
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Vocabulary Spelling GrammarNoun ClausesConjunctions and ClausesPrepositionsConditional and SubjunctivePresent, Past, Present Perfect and ComparativeNouns FormationOpinion / AgreementPossessive Nouns with Apostrophes and PronounsPast and Perfect TensesOther quiz:
Grammar › ViewSince I studied, I can be proud of the grade I get.
A. This is a simple sentence.
B. This is a compound sentence.
C. This is a complex sentence.
Grammar › View
Do you want to have a _______ door in your house someday ?
A. movable
B. controllable