once a year因该用什么提问

once a year因该用什么提问 They go to the park once a year (用once a year 提问) 对once a week提问用什么 用once a year造句 They move their homes once a year.划线提问,划once a year.对不起,刚开号, We do a bird count once a year.(对画线部分提问)划线部分是once We have a party once a year.（就划线部分提问,划线部分是:once a year) （对划线部分提问) They go to the seaside once a year.（划线部分 once a year） my mum washes the clothes once a week once划线用什么提问 once a year in Japan和in Japan once a year有什么区别么? three year 用什么提问 回答是：Twence a year 用什么提问? at once 划线用什么提问 对once a week 提问用? once a year啊,once是什么词性, 对括号部分提问：They go to London (once a year). I go to see my grandparents (once) a year.(对括号部分提问） They visit theur teacher once a year.(They划线提问）