He found most of those who had been angry ___ young later had troubles with their heart.

来源:百度知道 编辑:UC知道 时间:2024/05/20 09:58:09
答案是when

为什么during不行呢?

during不能直接加句子啊
要用的话,该是He found most of those who had been angry during which time young later had troubles with their heart.

during是介词后面跟短语
when是连词后面可以跟 句子,而原句后面是句子

during 后要加延续性的一段时间