马航官网订票流程:"曾做过义工"英语怎么说?
来源:百度文库 编辑:高校问答 时间:2024/05/24 07:44:01
used to be a volunteer
I was a volunteer (for XXX service).
use to be a volunteer
once to be a volunteer
used to be a volunteer
I was a volunteer (for XXX service).
use to be a volunteer
once to be a volunteer