"I read the newspaper every day."
Duolingo has to accept every answer that gets flagged manually, so they can ensure the best translations. Thus, a language will accept more translations the longer the language is out, as people are flagging sentences. Mandarin hasn't been out very long, so if you want better translations, you should flag sentences with your opinion, and see if the moderator accepts your translation. :) It doesn't help too much if you post complaints in the content section.