that was the first time in more than 30 years of teaching that he had heard such compliments.
问题描述：
that was the first time in more than 30 years of teaching that he had heard such compliments.
这句话中的in可以换成during不,后面一个that可以去掉不
答
it(this,that) be the first time that……这个结构中的that实际上是替代了when,它和when都可以省略.使用that是一种口语用法.如This is the first time (when/that)he had trouble with the boss.这是他第一次麻烦老...