You ______ to see a doctor right now.A．have better go B．have better to goC．had better go D．had better to go选什么?为什么?

You ______ to see a doctor right now.
A．have better go B．have better to go
C．had better go D．had better to go
选什么?为什么?

C．had better go
你最好去看医生~
had better do sth : 还是……好 | 最好做某事: | 最好做…

C．had better go
had better 固定词组接动词原形