Title/Topics UNIT9 Self-improvement UNIT10 The past and the future UNIT11 Life's little lessons UNIT12 The right stufff REVIEW OF UNITS9-12 UNIT13 That's a possibility. UNIT14 Behind the scenes UNIT15 There should be a law! UNIT16 Challenges and accomplishments REVIEW OF UNITS 13-16 UNIT.SUMMARIES APPENDIX Intechange Activity UNIT9 “Keeping up appearances”:Giving advice about teenage problems UNIT10 “History buff”:Taking a history quiz UNIT11 “If only....”:Imagining different posssibilities for youself UNIT12 “A picture's worth...”:Talking about how advertisements work REVIEW OF UNITS9-12 UNIT13 “Photo plays”:Drawing conclusions about unexplained events UNIT14 “Who makes it happen?”:Figuring out who makes diferent businesses work UNIT15 “Setting the rules”:Making up your own rules UNIT16 “Uiwpoints”:Taing a survey about volunteering REVIEW OF UNITS13-16 UNIT SUMMARIES APPENDIX