I was deep in thought ________ __________ ________ _________ (这时电话铃响了)
问题描述：
I was deep in thought ________ __________ ________ _________ (这时电话铃响了)
答
when the bell rang
答
when the telephone rang(when=and at that time)
when用作并列连词，前面的句子用进行时或表示状态意义的谓语
答
when the telephone rang
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