◎ 题干
The telephone ________,   but by the time I got indoors,   it stopped.
 [     ]
A. had rung 
B. was ringing
C. rings  
D. has rung
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“The telephone ________, but by the time I got indoors, it stopped.[ ] A. had rungB. was ringingC. ringsD. has rung…”主要考查了你对  【过去进行时】  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。