1. albero della castagna   pine   elm   poplar   chestnut   Hint Half-n-half Clue   2. olmo   elm   poplar   chestnut   pine   Half-n-half Clue   3. acero   maple   chestnut   birch   oak   Half-n-half Clue   4. quercia   fir   beech   poplar   oak   Half-n-half Clue   5. pino   cedar   maple   elm   pine   Half-n-half Clue   6. cedro   fir   elm   birch   cedar   Half-n-half Clue   7. abete   oak   chestnut   fir   pine   Half-n-half Clue