--- 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．OnceB．Even ifC．UnlessD．In case
A

試題分析：句意：— 父親，我我不想?yún)⒓覬immy的生日聚會(huì)。— 你最好去。一旦你做出承諾，你就要守信。此處Once一旦；Even if即使；Unless除非；in case以免。根據(jù)句意選A。
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