他每个周末都去观看摩托车比赛，因为他热爱赛车运动。

He goes to watch motorcycle races every weekend because he loves ___motorsport.

这项赛车的受欢迎程度逐年增长，吸引了大量观众和赞助商。

The popularity of ___motorsport has been growing each year, attracting huge audiences and sponsors.