D. Verbs taking a direct quotation do not take verb-suffix le 了.
Note: (x) means that -le 了 may not be used there.
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Tā shuō (x), “Wǒ yǐjīng bìyè sān nián le.”
他说:“我已经毕业三年了。”
He said, “it's been three years since I graduated.”
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Tā wèn (x) wǒ: “Nǐ chī fàn le ma?”
他问我:“你吃饭了吗?”
He asked me, “Have you eaten yet?”