问题
选择题
--- 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
答案
答案：A
题目分析：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。