This is a school app, and the only thing you can ask is school questions or the moderators (which there are a lot) will remove ur question and give u a warning. to many warnings and they delete ur account. Answer questions to get points, points make it so that you can ask questions.
A) Subject
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The impersonal voice is a verb formation in which the subject is not specified
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Espero que Esta respuesta te ayude
A it’s seems more reasonable but I don’t know what is exentrica
