1. 救生衣   towel   lifejacket   swimming trunks   surfboard   Hint Half-n-half Clue   2. 游泳裤   sand   swimming trunks   sand castle   shovel   Half-n-half Clue   3. 沙子城堡   sand castle   shore   pail   surfboard   Half-n-half Clue   4. 海   sand castle   sea   sea gull   lifeguard   Half-n-half Clue   5. 沙子   towel   sand   wave   lifeguard   Half-n-half Clue   6. 岸   shell   surfboard   shore   pail   Half-n-half Clue   7. 铁锹   swimsuit   shore   shovel   swim   Half-n-half Clue