Don't grow old; grow up.Old and up are adverbials in the above sentence.

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• If two people don't want to pay the bill together mean “Let's take AA system”。
• You don't need to know anything about the company before the interview。
• What information do you don't need to know about the company before the interview？
• Vegetarinans don't eat certain animal （）(produce).
• The reason why most plastic packaging materials don’t get recycled is that many people don’t realize their side-effects.