单选题 The Olympic Games are held.

【正确答案】 A
【答案解析】[解析] 事实细节题。根据文章第一句话The Olympic Games are held every four years in a different city in the world奥运会每四年一次,每次都在世界的不同城市举行,可知答案为[A]each time in a different city。