Fill in the blank below with the appropriate relative pronoun.J'ai besoin de savoir tu as dis.

The correct phrase is “J'ai besoin de savoir ce que tu as dit” (“I need to know what you said”). Use “ce que” because it refers to the thing that is the direct object of “as dit” (said); “que” does not elide here because the next word, “tu,” begins with a consonant.

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