内容介绍：序号 1 2 3标志 3 3 3英文单词 a(an) able about4 3 accept 5 3 across 6 3 act7 3 action 8 3 after9 3 again 10 3 against 11 3 age 12 3 ago 13 3 agree 14 3 air 15 3 all16 3 allow 17 3 almost 18 3 along19 3 already