Why not ( )(have) a taste of the cake I've got here.按所给词的正确形式填空

问题描述:

Why not ( )(have) a taste of the cake I've got here.
按所给词的正确形式填空

have
why not + do sth

have
why not do sth.?固定结构

have
why not do sth.

have

have
why not 后面得跟 动词原形