题目内容：

At one point,it seemed certain that their plane would crash 问一下that引导的是什么从句呀……谢谢!

优质解答

At one point,it seemed certain that their plane would crash 其中某个时候,看来他们的计划就要完蛋了.主语从句.（1）为避免头重脚轻,常以形式主语it引导从句.It+形式主语谓语+从句.　　（2）由于主语从句一般被认...