请问it was worth saving two boys at the cost of three students' lives.这是什么句型,里面的it指什么
问题描述：
请问it was worth saving two boys at the cost of three students' lives.这是什么句型,里面的it指什么
原句是：they ask if it was worth saving two boys at the cost of three university students'lives.
答
it代指后面的saving two boys at the cost of three university students' lives.
意思是：（他们问）以三个大学生的生命为代价去挽救两个男孩,（它）值得吗?