You weren't here yesterday,are you?为什么是are you?―He didn’t tell me anything _______ he left.

问题描述:

You weren't here yesterday,are you?为什么是are you?―He didn’t tell me anything _______ he left.
为什么选B
B .before

因为是现在问的
在他离开前什么都没有说,根据翻译就选before