对twice a month提问,应用什么疑问词

对twice a month提问,应用什么疑问词 he visit his grandparents twice a month.对twice a month提问 the My father flies to Shanghai twice a month.对twice a month提问,_ I visit my grandparents twice a month.对划线部分提问,划线部分为twice. he goes to the movies once or twice a month 对once or twice提问 Sally writes to her mother twice a month,对twice提问 He watches TV twice a month提问 His friend goes hiking twice a month.(对划线部分提问）划线部分是twice a m my parents go to the cinema (twice a month)对括号圈起来的部分提问 My parents visit my grandma ( twice a month ) .对括号部分提问 Lucy's mother goes to Beijing （twice a month）.对括号部分提问. she writes to her mother (twice a month)对括号部分提问