Motocross World Championships. The first series in this category was won by German motocross rider Fritz Betzelbacher，followed in second position by fellow countryman Willi Oesterle. In 1961，the first three winning positions were all occupied by British motocross riders Dave Bickers，Arthur Lampkin and Jeff Smith，respectively (各自地).

It was in 1975 that the 125cc motorcycles entered the Motocross World Championship arena (竞技场). Belgium was once again the champion-winning country in the first few years.

Over the years，motocross has become one of the most popular motorcycling events in the world. It has led to the development of variations that are full of the excitement and adventure the sport continues to produce among riders of all kinds.

【语篇解读】　欧洲摩托车越野赛始于1924年，目前已发展为包括500cc、250cc、125cc等不同组别的大型国际比赛。

1. Which of the following is NOT true according to the passage?

A. Belgian riders took most of the champions in the first few years of the 500cc category.

B. German riders won the first three positions in the 250cc category in 1957.

C. British riders took the first three prizes of the 250cc category in Motocross 1961.

D. Belgian took most of the championships in the first few years of the