I had just fallen asleep when the doorbell rang.
我刚入睡，门铃突然响了起来。
I was about to leave home when the doorbell rang.
我刚要出门，这时门铃响了。
When are you going to fix your doorbell?
你什么时候修门铃？
I had hardly sat down for a rest when the doorbell rang.
我刚坐下来休息门铃就响了。
I was reading the newspaper when the doorbell rang.
我正在看报，突然门铃响了。
I was watching TV when I heard the doorbell.
听到门铃响的时候，我正在看电视。
It was well past nightfall one evening when we heard the doorbell ring.
一个黄昏过后的傍晚，我们听见有人按门铃。
It was well past nightfall one evening when we heard the doorbell ring.
一个黄昏过后的傍晚，我们听见有人按门铃。
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