简介： 一． 1-5 CBBCA 6-8 CAB 9-13 BBCBB 14-17 BACA 18-20 CAB 21. England 22.week 23.walk 24.thirty 25.Once 二．26-30 ABDCC 三．31-35.DABCE 四．36．population 37．largest 38．only 39．they 40．when 41．increase 42．ideas 43．so 44．because 45．More 46．was searching 47．to catch 48．t...