◎ 题干
Mr Black was doing shopping at the supermarket ______ his mobile phone rang.

[     ]

A. when
B. while
C. after
D. until
◎ 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“Mr Black was doing shopping at the supermarket ______ his mobile phone rang. [ ]A. when B. while C. after D. until …”主要考查了你对  【并列连词】  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。