【few】How often do you go to the library?--______.
问题描述：
【few】How often do you go to the library?--______.
B.Every few days
C.Each third day D.Every a few days
请问为什么是b啊,
答
B
C的表达错误.
只有Every three days和 Every third day,没有题目的表达
D是中国英语,没那种表达