The book was so interesting that he had read it for three hours____he realized it.（before/until）好像正确答案是before ,.....
问题描述：
The book was so interesting that he had read it for three hours____he realized it.（before/until）
好像正确答案是before ,.....
答
The book was so interesting that he had read it for three hours_until___he realized it.
答
until
答
应该是before,我以前做过,也错过,所以印象深刻