Hardly had the singer appeared on the stage when the audience burst into applause at once.
问题描述：
Hardly had the singer appeared on the stage when the audience burst into applause at once.
答
这位歌手一出现在舞台上，观众就立刻掌声雷动。
hardly had ......when .....一.......就.....
答
Hardly had the singer appeared on the stage when the audience burst into applause at once.
歌手一出现在舞台上,观众就立刻爆发出一阵掌声..
hardly had .when .一.就.