案例分析题Last year our country hosted the Olympic Games. It is held (1) .Many players (2) , all over the world take part in it. The old Olympic Games began around the year 776BC in Greece and the modern games came from the (3) ones.The Olympic Games stopped for a long time. But people didn’t (4) them. The first Olympic Games in modern times happened in 1896. They were held in Greece—the games were born in this (5) . In the 1896 games, there were 311 players from just thirteen countries. After that, (6) countries took part in the games.One of the great competitions (7) not for a medal. It’s the competition among countries to hold the game. To hold the Olympic Games is a great prize (8) a country. Last year, Beijing (9) the 29th Summer Olympic Games. We all felt (10) our great country. （1）处应填写（）

A. every four years
B. every year
C. every four year