He was absent from school yesterday because he was ill.He was absent from school ____ of his____.

问题描述:

He was absent from school yesterday because he was ill.He was absent from school ____ of his____.
保持句意不变

He was absent from school 【because】 of his【illness】_.
because of sth 因为某事.
因为生病了,所以他没去上学.