问题
选择题
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
答案：A
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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：A