◎ 题干
Many of the audience ______ asleep when they ______ the lecture.
[     ]
A. fell; were hearing
B. were falling; heard
C. had fallen; heard
D. fell; had heard
◎ 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“Many of the audience ______ asleep when they ______ the lecture.[ ]A. fell; were hearingB. were falling; heardC. had fallen; heardD. fell; had heard…”主要考查了你对  【一般过去时】【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。