Конструкция to have something done в разных временах

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The first Olympic Games were held by Greeks in the year 76 B.C. They then were held once in four year each times. The four-year period all the games was called the Olympiad. Greece at that time was divided into several states. The men of all the Greek states were must to take part in the games. When the games were open all the wars were stopped and the peace was proclaimed.