Ⅰ、1-5：E F A B C
Ⅱ、6-10：B D C A B
11-15：C D C A B
Ⅲ、16-20：B C B B A
Ⅳ、21、He is 13 years old
22、No，he isn't
23、in
24、My favourite sport is swimming
25、Chinese