Exercise One 1
Exercise Two 5
Exercise Three 9
Exercise Four 13
Exercise Five 16
Exercise Six 20
Exercise Seven 23
Exercise Eight 27
Exercise Nine 30
Exercise Ten 34
Exercise Eleven 38
Exercise Twelve 41
Exercise Thirteen 44
Exercise Fourteen 48
Exercise Fifteen 51
Exercise Sixteen 55
Exercise Seventeen 59
Exercise Eighteen 63
Exercise Nineteen 67
Exercise Twenty 71
录音原文及答案 74
Exercise One 74
Exercise Two 79
Exercise Three 83
Exercise Four 88
Exercise Five 92
Exercise Six 97
Exercise Seven 101
Exercise Eight 106
Exercise Nine 111
Exercise Ten 115
Exercise Eleven 120
Exercise Twelve 125
Exercise Thirteen 129
Exercise Fourteen 133
Exercise Fifteen 137
Exercise Sixteen 142
Exercise Seventeen 147
Exercise Eighteen 151
Exercise Nineteen 155
Exercise Twenty 160
参考文献 165