题目内容
While watching television, _______________________.
A. the doorbell rang B. we heard the doorbell ring
C. there was someone knocking at the door D. we heard the doorbell rung
B
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题目内容
While watching television, _______________________.
A. the doorbell rang B. we heard the doorbell ring
C. there was someone knocking at the door D. we heard the doorbell rung
B