我进屋时,他在读书。请帮忙给出正确答案和分析,谢谢!

2024-03-05 11:35

我进屋时,他在读书。请帮忙给出正确答案和分析,谢谢!
2024-03-05 14:12
正确答案:When I entered the room he was at his books.
When I entered the room, he was at his books.