Exercise One 1
Exercise Two 4
Exercise Three 8
Exercise Four 11
Exercise Five 15
Exercise Six 18
Exercise Seven 22
Exercise Eight 26
Exercise Nine 30
Exercise Ten 34
Exercise Eleven 38
Exercise Twelve 42
Exercise Thirteen 46
Exercise Fourteen 50
Exercise Fifteen 54
Exercise Sixteen 58
Exercise Seventeen 62
Exercise Eighteen 66
Exercise Nineteen 70
Exercise Twenty 74
录音原文及答案 78
Exercise One 78
Exercise Two 83
Exercise Three 88
Exercise Four 93
Exercise Five 98
Exercise Six 102
Exercise Seven 107
Exercise Eight 112
Exercise Nine 117
Exercise Ten 122
Exercise Eleven 127
Exercise Twelve 132
Exercise Thirteen 137
Exercise Fourteen 142
Exercise Fifteen 147
Exercise Sixteen 153
Exercise Seventeen 158
Exercise Eighteen 163
Exercise Nineteen 168
Exercise Twenty 173
参考文献 178