1-5.ABBAB 6-10.ABCAB 11-15.CACBC
16-20.CABCC 21-25.DCABA 26-30.DCDBC31-35.CBABB 36-40.CBCAB 41-45.ADDDC
46-50.DBDCB 51-55.ACDBD 56-60.CABDA 61-65.ACCBA 66-70.DDBBB 71-75.DEBGC
which-whose take-took speech-speeches students后面加were that-to on the stage!
the去掉 whatever-what them-themselves deep-deeply
hower-therefore