When do the bus usually leave?

When do the bus usually leave? 1、what time do the bus usually leave?（改错） what time do the bus usually leave?改错 为什么要把DO改为does When（）the first bus leave? when does the next bus leave for the airport A: When do they leave? When did you leave the bus station?( ) I saw him get on the When did you leave the bus station?（）I saw him get on the bu when do you usually water the flower改为被动语态 when do you usually go to the school libr When do the girls go swimming?They usually------------------ When do you usually s__ your school in the morning