1. catch   ping-pong, table tennis   boxing   wrestling   gymnastics   Hint Half-n-half Clue   2. basket-ball   athletics   basketball   boxing   tennis   Half-n-half Clue   3. natation   billiards   swimming   weightlifting   rugby   Half-n-half Clue   4. base-ball   skating   baseball   swimming   skiing   Half-n-half Clue   5. volley-ball   volleyball   ping-pong, table tennis   baseball   rugby   Half-n-half Clue   6. badminton   badminton   skating   volleyball   rugby   Half-n-half Clue   7. rugby   boxing   rugby   wrestling   skiing   Half-n-half Clue