[ Present Perfect Continuous Tense ]
I’m sleepy because I … all night.
A. have been staying up
B. has been staying up

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Apostrophes and GrammarPhrase vs ClauseContrastive ConjunctionAdverbial Clause of Cause and EffectPreposition and Word FormPast Tense vs Present Perfect TensePresent PerfectFamily VocabularyComparative and Superlative AdjectiveFuture Time and TensesOther quiz:
Possessive Nouns › ViewChoose the right possessive sentence. (singular)
A. The dog’s vacation was very relaxing.
B. The dogs’ vacation was very relaxing.
Grammar › View
I like chocolate, vanilla, and caramel flavors
A. NO CHANGE
B. vanilla—and
C. vanilla. And
D. vanilla (and