If you do not feel well,you___go to see a doctor.有need,dare,be able to,have to,had better
问题描述：
If you do not feel well,you___go to see a doctor.
有need,dare,be able to,have to,had better
答
had better好
答
had better ,谢谢采纳
答
由于if 引导句表示假设，所以后面的句子也用假设句，不用肯定句
need,必须去，语义不对（而且need后面用to do 或doing）
dare,敢去
be able to,能去（表示个人能力），不恰当
have to, 必须去
had better最好去，表示一种建议
答
had better 最好
答
had better最好
答
have to