You'd better ________ when you come in.
A.not to wake him upB.not wake him upC.to not wake him upD.not waking him up在线课程B
解析：
had better是复合情态动词，后面只能跟不带to的不定式；
其肯定或否定意思是通过不定式的肯定或否定形式来表达的，表示否定意思时，在不定式前加not。