1. [hua;hua] xue   physics   chemistry   biology   trigonometry   Hint Half-n-half Clue   2. xin li xue   physics   psychology   algebra   astronomy   Half-n-half Clue   3. [ji;ji] [he;he]   botany   astronomy   geometry   zoology   Half-n-half Clue   4. li shi   geology   history   biology   calculus   Half-n-half Clue   5. zhe xue   chemistry   philosophy   geometry   calculus   Half-n-half Clue   6. wu li   biology   calculus   physics   algebra   Half-n-half Clue   7. tian wen   psychology   astronomy   calculus   botany   Half-n-half Clue