1-5：BCCAA
6-10：AACCB
11-15：CBBCA
16-20:CCBAB
21-25:AACAA
26-30:CBBDB
31-35:DBDCC
36-40:ABDCD
41-45:ABCDA
46-50:BCDAC
51-55:DABCD
56-60:CCADA
61-65:BAABB
66-70:DDCBC
71-75:DBCAD
76:去掉has
77：does→is
78:culture→cultures
79:√
80：what→which
81:make→makes
82:understood→understanding
83:she→he
84:exams前加in
85:secret→secretly
作文就不用了吧?