[ Modal Auxiliary Verbs ]
They ______ (have to / must) clean their room before they can go out.
A. have to
B. must
Select your answer:

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Modals and Adjectives (ed-ing)Grammar for TOEFLAdjective or AdverbPronoun-Verb AgreementGrammar - either...or, neither...norPresent Perfect TensesWestern Europe CountriesConditional TensesSentences vs Run-Onsused to, be used to, get used toOther quiz:
Grammar › ViewThe cake tastes good! Who _____?
A. bakes it
B. is baking it
C. will bake it
D. baked it
Preposition & Relative Clauses › View
The teacher ___ helps me is kind.
A. who
B. whom
C. that
D. which
