.（2010·山东淄博高三第一次摸底考试）32. They will show ten topics — from using clean energy _________ the environment — and give you a chance to make your own choice.
A. to protect B. to protecting
C. protecting D. protected
.（2010·山东淄博高三第一次摸底考试）32. They will show ten topics — from using clean energy _________ the environment — and give you a chance to make your own choice.
A. to protect B. to protecting
C. protecting D. protected
B