[ Subject-Verb Agreement ]
Turtles are unique; each (has, have) eight cervical vertebrea, compared with seven of most mammals.
A. Has
B. Have

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Verbs and PrepositionsPresent and Future TensesCoordinating and Subordinating ConjunctionsTransitive and Intransitive Verb-ing &-ed AdjectivesStative Verbs and TensesRelative - ConditionalPassive SentenceSimple Verb TensesGrammar - Verb FormsOther quiz:
Grammar › ViewBenny liked to eat cookies, but he didn’t know ___, so he learned it himself by watching a lot of videos on YouTube.
A. how to make them
B. how to make
C. how could he make them
D. how he could make
Modals of Obligation and Permission › View
My dad _____ wear a uniform for his job as a security officer at the airport.
A. can
B. has to
C. have to
D. could