The correct affirmative tú (informal) command in Spanish for 'leave' is 'O Sala'.
The correct affirmative tú (informal) command to complete the sentence is 'O Sala'. In Spanish, affirmative tú commands are formed by taking the third person singular form of the present indicative verb without the subject pronoun. In this case, 'salir' (to leave) becomes 'sal', and then 'O Sala' for the affirmative tú command.
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