CONTENTS 1
Part Ⅰ 1
Unit One Text A 3
Unit One Text B 11
Unit Two Text A 14
Unit Two Text B 22
Unit Three Text A 25
Unit Three Text B 34
Unit Four Text A 37
Unit Four Text B 45
Unit Five Text A 48
Unit Five Text B 56
Unit Six Text A 59
Unit Six Text B 67
Unit Seven Text A 70
Unit Seven Text B 77
Unit Eight Text A 80
Unit Eight Text B 87
Unit Nine Text A 90
Unit Nine Text B 98
Unit Ten Text A 101
Unit Ten Text B 109
PartⅡ 113
Unit One Text A 115
Unit One Text B 123
Unit Two Text A 127
Unit Two Text B 135
Unit Three Text A 139
Unit Three Text B 149
Unit Four Text A 153
Unit Four Text B 161
Unit Five Text A 165
Unit Five Text B 173
Unit Six Text A 177
Unit Six Text B 185
Unit Seven Text A 189
Unit Seven Text B 197
Unit Eight Text A 201
Unit Eight Text B 209
Unit Nine Text A 213
Unit Nine Text B 221
Unit Ten Text A 225
Unit Ten Text B 233