问题
选择题
The pilot asked all the passengers on board to remain ______ as the plane was making a landing.
A．seated
B．seating
C．seat
D．to be seating
答案
答案：A
这题考查remain +done结构，过去分词做remain的表语，因为seat是及物动词，表示就坐是seated，句意是：飞行员让所有机上乘客飞机起飞时，要仍然坐着。选A。