完成句子
①Wait until the children _________________________ before you start the lesson.
等学生都静下心来你再开始上课。
②We only moved last week and we haven’t _________________________ yet.
我们上星期才搬的家，还没安顿下来呢。
③Have you _________________________ the wallpaper you prefer?
你选好你喜欢的壁纸了吗?
④He asked the waiter for the bill, and _________________________.
他向服务员要来了账单，然后结了账。