◎ 题干
I tried to call you _____ I heard from him, but you were not in.

[     ]

A. since
B. while
C. until
D. as soon as
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“I tried to call you _____ I heard from him, but you were not in. [ ]A. since B. while C. until D. as soon as …”主要考查了你对  【从属连词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。