Unit One 1
Unit Two 12
Unit Three 23
Unit Four 34
Unit Five 45
Unit Six 56
Unit Seven 68
Unit Eight 80
Unit Nine 92
Unit Ten 104
Unit Eleven 116
Unit Twelve 128
Unit Thirteen 140
Unit Fourteen 152
Unit Fifteen 164
Unit Sixteen 176
Unit Seventeen 188
Unit Eighteen 201
Vocabulary List 1（In Unit Order） 215
Vocabulary List 2（In Alphabetic Order） 221