Challenge to speak.4,Teacher’s book

unit 1
economic crisis and the war of words
unit2
the ancient city of pingyao - china\'s world
cultural heritage
unit 3
dating out - may i have a date?
unit4
the chinese greenhouse road to prosperity
unit 5
signboard culture - signs and commericials
unit 6
global warming - a warning of danger
unit 7
chinese festivals and social customs
unit 8
drugs-playing with fire
unit 9
made in china-a visit to the china import and export fair
unit u 10
.ever changing fashion
unit 11
the gift of life-organ oonation
unit 12
sports and the olympics
unit 13
expo 2010 shanghai china
unit 14
watching a gooo movie or w smow
unit 15
drunk-driving-who is in danger?
unit 16
ancient chinese architecture and classical gardens
unit 17
cheat and cheat yourself
unit 18
new challenges-job hunting
appendix i
useful functional patterns
appendix ii
materials for extracurricular activities