What surprised me most was to see some of the village people

B.seated 为正确选项.
seat这个词,做动词时,是“使坐在...”的意思,当表示“某人坐在...”的意思时,要用过去分词的,不能用现在分词.而sit则和它相反,都是用主动式的.这是seat和sit最大的区别.试比较：
I saw him seating in the room.
I saw him seated in the room.
My father was sitting in the room.
My father was seated in the room.