—Iwasabouttoleavehome

问题详情：

— I was about to leave home _____ it started to rain this morning.

   — I think it is just timely (及时的) rain. The weather report says the rain won’t stop _____ tomorrow evening.

A. when; since             B. while; until             C. when; until           D. while; since

【回答】

C

知识点：连词

题型：选择题