[ Grammar ]
Choose the word that goes best with the underlined section of the sentence:
Divers hold their air in their lungs.
A. Companion
B. breath
C. frisky

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Modals › ViewTim looks so frightened and upset. He _____ something terrible.
A. must experience
B. ought to have experienced
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Grammar › View
The simple predicate is always a(n) _____.
A. noun
B. pronoun
C. preposition
D. verb