1题seat可以理解为安排某人就坐,seat sb;如果自己就坐就是be seated,remain 是联系动词 remain seated 也就等于be seated。同样的词如dress ,dress sb 给人穿衣,自己穿衣是be dressed。2题suggest接动词用doing 形式,即动名词Bill suggested holding a meeting a meeting (on what to do for the Shanghai Expo )括号里的是a meeting 的定语修饰