They should do it at once.改成被动句.

They should do it at once.改成被动句. they should do it.at once They should do it at once. they should do the work at once改被动语态 英语翻译we should do it at once (该为同意句)we - - - do it at once they should always do everything well 改成被动语态 you shoud do your homework at once转为同义句 you should do your h They don't have to finish the work at once.(改成同意句) The suggestion____you should do it at once is not the one __ You should tell your mother about it at once.(同意句） =You __ _ they took the sick boy to the hospital at once改为被动语态 at once do your homework at once改为被动语态