We go to the school library twice a month.(划线部分提问）画线部分是twice a month.________ ________do you go to the school library?

We go to the school library twice a month.(划线部分提问）画线部分是twice a month.________ ________do you go to the school library?
We go to the school library twice a month.(划线部分提问）
画线部分是twice a month.
________ ________do you go to the school library?

We go to the school library twice a month.(划线部分提问）画线部分是twice a month.________ ________do you go to the school library?
How often
表示频率用的词组