— Father is sleeping. You’d better quiet— Sorry I won’t.A. keep B. to keep C. keepin

问题补充：

— Father is sleeping. You’d better quiet.

— Sorry, I won’t.

A. keep B. to keep C. keeping

答案：

解析：试题分析：固定结构had better表示最好做某事，后跟动词原形；其否定形式在动词原形的前面加not即可。结合语境可知选A。