雅思阶梯听力 1PDF电子书下载

概述 1

Unit One 3

Unit Two 5

Unit Three 8

Unit Four 10

Unit Five 12

Unit Six 15

Unit Seven 17

Unit Eight 20

Unit Nine 23

Unit Ten 26

Unit Eleven 29

Unit Twelve 32

Unit Thirteen 34

Unit Fourteen 37

Unit Fifteen 40

Unit Sixteen 43

Unit Seventeen 46

录音文本 49

答案 100

词汇表 108