我想要f6,f7 chem 的超難題目

ACTUALLY,YOU CAN DO THE PASS PAPER,
THE PASS PAPER LEVEL IS OK,
AND THE PASS PAPER IS THE BEST EXERCISE FOR STUDENTS.
IF YOU REALLY WANT SOME VERY DIFFERCULT,I 'D BETTER SUGGEST U TO ASK YOU TEACHER IN SCHOOL TO GET,BECAUSE ONLY THEY KNEW WHICH QUESTIONN IS REALLY超難 AND NOT OUT OF THE SYLLUBUS.