1. wei ji [fen;fen]   history   philosophy   calculus   chemistry   Hint Half-n-half Clue   2. [de;di] li   geography   biology   algebra   history   Half-n-half Clue   3. wu li   geography   astronomy   algebra   physics   Half-n-half Clue   4. sheng wu   chemistry   biology   algebra   zoology   Half-n-half Clue   5. tian wen   geology   astronomy   trigonometry   history   Half-n-half Clue   6. li shi   trigonometry   calculus   botany   history   Half-n-half Clue   7. xin li xue   calculus   psychology   geography   botany   Half-n-half Clue