The pilot asked all the passengers on board to remain ________ as the plane was making a landing．
A.seatB.seatingC.seatedD.to be seating在线课程C
be seated表示“坐着”，强调一种状态，这句句子的意思是“飞行员要求机上所有的乘客在飞机着陆以前不要离开座位。”这里的remain其实作系动词来用，remain seated就相当于be seated，所以我们选C项。