1.a2.c3.b4.a5.a6.c7.a8.a9.d10.d11.a12.b13.a14.a15.c16.b17.c18.c19.c20.a
A C B A A A A D D A B A A C B C C D C
For refer only:
ABBAA CAACD ABABC BCCDC
1. A
2. D
3.B
4. A
5. B
6.D
7. A
8.A
9.B
10. D
11.A
12. D
13. A
14.A
15. C
16.B
17.C
18.C
19.C
20.C
ABBAA BAACD ABBBC BCCDA