the Olympic Games are held A each four year B.every fourth years C every four years

题目

the Olympic Games are held A each four year B.every fourth years C every four years

答案

我们都知道奥林匹克运动会是每隔四年举行一次.表示“每隔……”、“每……”,要用“every＋基数词＋复数名词”.这种结构中的every不能用each替代.例如：
We hand in our homework every three days （我们每隔三天交一次作业）.