When she got to the school,the bell____(ring) for 2 minutes 正确形式填空

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When she got to the school,the bell____(ring) for 2 minutes 正确形式填空
When she got to the school,the bell____(ring) for 2 minutes 正确形式填空

When she got to the school,the bell____(ring) for 2 minutes 正确形式填空
had been ringing

ringed