Exercise One 1
Exercise Two 5
Exercise Three 9
Exercise Four 13
Exercise Five 17
Exercise Six 20
Exercise Seven 24
Exercise Eight 28
Exercise Nine 32
Exercise Ten 36
Exercise Eleven 40
Exercise Twelve 44
Exercise Thirteen 47
Exercise Fourteen 51
Exercise Fifteen 55
Exercise Sixteen 59
Exercise Seventeen 63
Exercise Eighteen 67
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 103
Exercise Seven 108
Exercise Eight 113
Exercise Nine 118
Exercise Ten 123
Exercise Eleven 128
Exercise Twelve 133
Exercise Thirteen 138
Exercise Fourteen 143
Exercise Fifteen 148
Exercise Sixteen 153
Exercise Seventeen 158
Exercise Eighteen 163
Exercise Nineteen 168
Exercise Twenty 173
参考文献 178