第1个回答 2011-08-10
When I left, he was doing his homework.
第2个回答 2011-08-10
When I left,he was doing his homework.
第3个回答 2011-08-10
When I left, he was doing his homework.
第4个回答 2011-08-10
When I went out,he was doing his homework.
第5个回答 2011-08-11
When I left, he is doing homework.