hold once a year什么意思

hold once a year什么意思 they hold a sports meeting in their school once a year改被动语态 hold a penny什么意思 once a year in Japan和in Japan once a year有什么区别么? once a year因该用什么提问 once a year啊,once是什么词性, once half year,twice a year 用once a year造句 once in a while ?什么意思? once-in-a-lifetime什么意思? place a hold意思 hold-up什么意思