It seemed certain that she would be the first ship home,but

it seemed certain that she would be first ship home it seemed certain that she would be the first ship home.这句话中 it seemed certain that she would be the first ship home.这里的s 请教前辈一个英语问题It seemed certain that she would be the first ship （新概念英语）It seemed certain that she the( ) first ship home. it seemed certain that 新概念二43课It seemed certain that the plane would crash是不是主语从句?如 It seemed certain that the plane would crash为什么不是certainly呢? it seemed certain that their plane would crash It seems/seemed certain that...Byrd now knew that he would . At one point,it seemed certain that their plane would crash. At one point,it seemed certain that their plane would crash