--- Daddy, I don’t want to go to Jimmy’s birthday.
--- You had better go. you make a promise, you have to keep it.
A. Once
B. Even if
C. Unless
D. In case
网友回答
(答案→)A. Once
B. Even if
C. Unless
D. In case
解析：句意：— 父亲，我我不想参加Jimmy的生日聚会。— 你最好去。一旦你做出承诺，你就要守信。此处Once一旦；Even if即使；Unless除非；in case以免。根据句意选A。