He promised to make a phone call to me ( ).

问题描述:

He promised to make a phone call to me ( ).
A.every fifth day B.every five day C.every five day D.each five day.
我要答案+理由+翻译!
C.every-five day
D.each five days

选A,
形容频度的结构,固定这么两种搭配
every fifth day或者 every five days