All of the students▁▁attentively when someone made a loud noise.(listen)

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All of the students▁▁attentively when someone made a loud noise.(listen)
All of the students▁▁attentively when someone made a loud noise.(listen)

All of the students▁▁attentively when someone made a loud noise.(listen)
were listening
复数主语用were,后面是过去时,listen是延续性动词,正在听,用过去进行时

were listening

were listening