the Olympic Games are held once ___A every four years B .every four year C.every -four -year怎样区分呢?为什么B 不可以呢？Every week 后面也不加s啊？

The Olympic games were the XXIX Olympic Games The Olympic games.还有The Olympic flame. The Olympic Games 可数吗 the Olympic Games是不是复数? The Olympic Games怎么读? olympic games the Olympic Games前面用什么介词?IN还是ATin the Olympic Games 还是at the Olympic Games? China held the 2008 Olympic Games s_____ China h、、、 the 2008 Olympic Games China held the ( ) Olympic Games in 2008 The Beijing Olympic Games 请问是指? Beijing _held____(举行)the 2008 Olympic Games. When were the Olympic Games held Beijing? The Youth Olympic Games的意思 where were the first olympic games held? the XXIX Olympic Games 中文意思 the Olympic Games 是单数还是复数