He left for New York _____ I could say goodbye to him.

He left for New York _____ I could say goodbye to him.
A、as
B、until
C、since
D、before
【正确答案】：D
【题目解析】：考查连词的用法。A由于，B直到，C既然，D在……之前。该句的意思是：“他去了纽约，临走以前我没有跟他告别。”故选D。