◎ 题干
The girl had hardly rung the bell _____ the door was opened suddenly, and her friend rushed out to greet her.

A. before
B. until
C. as
D. since
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“The girl had hardly rung the bell _____the door was opened suddenly, and her friend rushed out to greet her.[ ]A. before B. until C. as D. since …”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。