My mother drank some milk last night.要求按划线部分提问,划线部分是some mil

What did your mother drink last night?
再问： 为什么这么写？
再答： 特殊疑问句的构成： 1．如疑问词作其他成分，即对其他成分提问，其语序是：疑问词＋一般疑问句语序？ 如： What class are you in？ What does she look like？ Where are you from？ What time does he get up every morning？ How do you know？ 2．如疑问词作主语或主语的定语，即对主语或主语的定语提问，其语序是陈述句的语序：疑问词（＋主语）＋谓语动词＋其他成分？如： Who is singing in the room？ Whose bike is broken？