I did not know he came back _ I met him in the street.

问题描述:

I did not know he came back _ I met him in the street.
(选择)A.since B when C.until D after说明理由

选择C
A自从
B当...时候
C直到...时候
D...之后
将选项带入句子中,逻辑正确的只有“直到...时候”
翻译为:我不知道他回来了,直到我在街上遇见(才知道).