1. 篮球   boxing   basketball   ping-pong, table tennis   skiing   Hint Half-n-half Clue   2. 水球   water polo   athletics   skating   hockey   Half-n-half Clue   3. 曲棍球   hockey   skating   volleyball   horse-riding   Half-n-half Clue   4. 滑雪   hockey   wrestling   skiing   basketball   Half-n-half Clue   5. 橄榄球，足球   boxing   volleyball   ping-pong, table tennis   football, soccer   Half-n-half Clue   6. 马骑马   swimming   ping-pong, table tennis   badminton   horse-riding   Half-n-half Clue   7. 游泳   rugby   football, soccer   swimming   athletics   Half-n-half Clue