I.1~5 BADBB 6~10 AABCA

11~15 CBACA 16~20 CBBDA

II.1 winner 2.relaxed 3.careful 4.fifth 5.peaceful 6.tired 7.himself 8.advertisements 9.quickly 10.lucky

III.1.camp up 2.came ture 3.no matter 4.so that 5.stay up

IV.1.doesn't;or 2.How much 3.didn't it 4.prefer;to 5.be cleaned

V.1~5 EACDB

VI.1~5 DADCB 6~10 ABCDA

VII.1~5 FFTFT 6~10 DABBA 11~15 ACBCD

16.trees change a lot when they grow

17.catch enough sunlight

18.face challenges in life

19..becoming real adults