he has been working on his book for the past two mouths when at last he got home翻译
问题描述：
he has been working on his book for the past two mouths when at last he got home翻译
答
在他最终回家之前的两个月里,他一直在研究他的书.（他一直在钻研他的书.）（他一直在学习他的书.）