Question

One of the most important question they had to consider was ____of public health. 为什么添t

One of the most important question they had to consider was ____of public health. 为什么添that 并且这是个什么从句

Answer 1

首先有个错误：question那儿肯定是复数，加s.
that 在这儿只是一个代词。不是引导从句的。
they had to consider是个定语从句，先行词是questions，省略了引导词that

Answer 2

that代替前边出现的名词question ,避免重复。

追问

这是个表语从句么?

追答

不是表语从句，that(questin）做表语，of public health是定语。“是公共卫生问题”