电缆微孔杂质检测仪器:We mustn't sleep ____ class.
来源:百度文库 编辑:查人人中国名人网 时间:2024/05/24 01:39:02
填介词
in
We mustn't sleep in class.
We mustn\'t sleep in class.
in class表示在课堂上.
in
We mustn't sleep in class.
We mustn\'t sleep in class.
in class表示在课堂上.