Mrs Meade has graciously consented to supervise your detention.米德夫人好心答应在你放学后留校时指导你。They were kept in after school.放学后，他们被留校了。John was kept in at school one day last week.上星期有一天，约翰被留校了。Billy spilled the beans, so we all had to stay after school.比利泄露秘密，所以放学后我们都必须留校。