1. [de;di] zhi   physics   geology   chemistry   psychology   Hint Half-n-half Clue   2. [hua;hua] xue   chemistry   geometry   zoology   algebra   Half-n-half Clue   3. wu li   botany   geometry   physics   geography   Half-n-half Clue   4. zhi wu xue   geometry   physics   botany   biology   Half-n-half Clue   5. xin li xue   geology   geometry   trigonometry   psychology   Half-n-half Clue   6. dong wu xue   algebra   geology   zoology   geometry   Half-n-half Clue   7. [de;di] li   geography   history   philosophy   chemistry   Half-n-half Clue