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

问题描述:

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

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).