1. 网球   billiards   tennis   horse-riding   skating   Hint Half-n-half Clue   2. 橄榄球   water polo   skiing   badminton   rugby   Half-n-half Clue   3. 排球   skating   weightlifting   horse-riding   volleyball   Half-n-half Clue   4. 橄榄球，足球   gymnastics   boxing   football, soccer   badminton   Half-n-half Clue   5. 水球   baseball   tennis   swimming   water polo   Half-n-half Clue   6. 游泳   baseball   swimming   skiing   football, soccer   Half-n-half Clue   7. 乒乓球，乒乓球   boxing   baseball   ping-pong, table tennis   basketball   Half-n-half Clue