( )the professior devotes his spare time to teaching the young 应该选 as he is old 还是 old as he is

问题描述:

( )the professior devotes his spare time to teaching the young 应该选 as he is old 还是 old as he is
为什么答案给的是as he is old 我也知道是要倒装~那as he is old 也对么?请给个详细点的语法解析吧

As he is old
这个很简单啊 ,翻译过来就明白了
As he is old 当他年迈的时候 他XXXXXXX
如果用后面倒装的答案 翻译为 像他一样年纪的老人 XXXXX
文不对题