They must be in the reading-room,_______ _______[
问题描述:
They must be in the reading-room,_______ _______[
They must be in the reading-room,_______ _______[反义疑问句]
答
这里的must be 是肯定推测语气,不是must必须的意思,所以翻译疑问句用 aren't they?