The pilot asked all the passengers on board to remain as the plane was making a landing. A

问题补充：

The pilot asked all the passengers on board to remain as the plane was making a landing.

A. seat

B. seating

C. seated

D. to be seating

答案：

A. seat

B. seating

(答案→)C. seated

D. to be seating

解析：考查非谓语动词。seated adj.坐着的 remain seated 保持坐着 （表状态）