1. 红木   willow   rosewood   sandalwood   spruce   Hint Half-n-half Clue   2. 云杉   coconut   palm   willow   spruce   Half-n-half Clue   3. 辛可宁   palm   cinchona   coconut   willow   Half-n-half Clue   4. 棕榈   palm   spruce   teak   cinchona   Half-n-half Clue   5. 椰子   coconut   spruce   willow   rosewood   Half-n-half Clue   6. 冬青属   coconut   holly   spruce   willow   Half-n-half Clue   7. 杨柳   willow   teak   rosewood   spruce   Half-n-half Clue