Please remain until the plane has come to a complete stop. A. to sealB. to be seatedC. sea

问题补充：

Please remain until the plane has come to a complete stop.

A. to seal

B. to be seated

C. seating

D. seated

答案：

A. to seal

B. to be seated

C. seating

(答案→)D. seated

解析：seat是及物动词,后常接反身代词作宾语。表示“坐下”时，常用be seated。remain和be一样都是系动词，后接动词+ed形式，表示“在飞机完全停下来前要坐在自己的座位上”。