1. ニレ.   oak   elm   birch   fir   Hint Half-n-half Clue   2. カバノキ, カンバ   poplar   oak   elm   birch   Half-n-half Clue   3. マツ   elm   pine   oak   birch   Half-n-half Clue   4. ブナ.   oak   cedar   birch   beech   Half-n-half Clue   5. ヒマラヤスギ   pine   chestnut   cedar   beech   Half-n-half Clue   6. モミ   oak   cedar   beech   fir   Half-n-half Clue   7. クリ   oak   poplar   chestnut   pine   Half-n-half Clue