第1个回答 2010-04-21
how long did you stay at school yesterday?
第2个回答 2010-04-21
How long did you stay in school yesterday?
第3个回答 2010-04-21
how long did you stay at school yesterday?
第4个回答 2010-04-21
How long have you stayed in the school yesterday?
第5个回答 2010-04-21
how long have you been staying at school yesterday?