题目内容

While watching television, ________．

[　　]

A．the doorbell rang

B．the doorbell rings

C．we heard the doorbell ring

D．we heard the doorbell rings

答案：C
解析：

watching television的动作执行者是we，所以句子的主语应该是we。heard sb．/sth．do sth．表示“听到……做了某事”，要用动词原形作宾补。


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