they were told it was a natural part of aging

题目

they were told it was a natural part of aging
我想不通为什么要加were
they told it was a natural part of aging
我忘记了 什么时候能省略 that

答案

they were told it was a natural part of aging
were told 是被动语态
they told it was a natural part of aging
如果用这种形式,told应换成said（that）比较好 或they told sb (that),
连接宾语从句的that可省,定语从句中作从句的宾语时that也可省.