Please keep until the bus comes to a full stopA. seatB. seatedC. to seatD. seating

问题补充：

Please keep until the bus comes to a full stop

A. seat

B. seated

C. to seat

D. seating

答案：

A. seat

(答案→)B. seated

C. to seat

D. seating

解析：考查过去分词转换的形容词。Seated adj就坐的,坐好的。和系动词keep构成系表结构。