I think it would be did because it make more sense with the sentence see Man <u>did</u> in der <em>schule</em><em> </em><em>order</em><em> </em><em>beim</em><em> </em><em>lernen</em><em> </em><em>einer</em><em> </em><em>Sprache</em><em> </em><em>aufpassen</em>
Ensuring that risks are reasonable in relationship to anticipated benefits. ... The Public Health Service Tuskegee Study of Untreated Syphilis in the Negro Male
