Aizawa : "See now that you've actually redone your work then-. . ."

(He looked at your essay and realized you had written pages to pages. You were normally slacking with your work so he knew something was up.)

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Aizawa : "When did you go to bed last night. . .? Because this is alot of pages. . ."

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(He looks at you in curiousity because he knew something was up)