unit 1 friends
unit 2 allow me to introauce myselfl
unit 3 by invitation only
unit 4 as time goes by
unit 5 let me entertain you！
unit 6 it was only a gesture
unit 7 the sport of shopping
unit 8 love and marriage， go together like a horse and carriage
unit 9 a family portrait
unit 10 all in a days work
unit 11 hitchin a ride
unit 12 for every time， there is a season
unit 13 news， weather and sports
unit 14 man on street interviews
unit 15 may ask who is calling？
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