Viết lại câu sao cho không đổi nghĩa so với câu gốc

2. Don’t wear casual clothes to an interview.
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3. It’s necessary for you to arrive on time.
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4. It isn’t necessary for you to give very long answers.
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5. Don’t fold your arms.
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6. It’s necessary for you to look the interviewer in the eye.
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7. Don’t leave your mobile phone switched on.