问题描述：
回答这个英语题目（改写句子）
题：You had better see a doctor.(改为否定句)
答：You had _________ __________see a doctor.
两根横线上填什么?
题：You had better see a doctor.(改为否定句)
答：You had _________ __________see a doctor.
两根横线上填什么?
问题解答：
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