[ TOEFL Grammar ]
“John isn’t sure that the meeting will be held tomorrow.”
“But I ____.”
A. certain
B. certainly
C. am certain
D. am certainly

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Comparatives, Superlatives, and ModalsPossessive Adjectives and Possessive PronounsPresent ContinousGrammar - Compound SentencesVerbs & Verb TensesAdverbs, Modals, Preposition of timeTenses and PronounsVerb Present Simple TenseAspect or tenses of VerbsInfinitives or GerundsOther quiz:
Past Tenses › ViewHow do we call the different forms of grammatical times?
A. forms
B. tenses
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Present Simple › View
We ____ breakfast together every morning.
A. eat
B. eats
C. eating
D. ate