For each sentence, tell which word is indefinite pronoun and which verb agrees with it

For each sentence, tell which word is indefinite pronoun and which verb agrees with it. 1.everything outside (is,are) covered with snow. 2.several of the campers (guess,guesses) about it 3.someone (says,say) kyle wrote the note 4. all (enjoys,enjoy) the guessing game.
 

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