[ Modals ]
_______be sitting down at your desk when the bell rings.
A. You can
B. You must not
C. You have to
D. You do not have

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Regular Plural NounsGrammar and Verb TensesTOEIC Grammar and Vocabulary ReviewConjunctions and PrepositionsComparative and Superlative AdjectiveAdverb PhrasesRegular and Irregular VerbsPast Simple (to be)Conditional ClauseTenseOther quiz:
Linking Verb › ViewJohn _______ impolite today. He is always polite and helpful to others.
A. is
B. was
C. is being
D. was being
Simple vs Present Continuous Tenses › View
Ronald and I … football in the school yard now.
A. am playing
B. are playing
C. is playing