1. After dinner he gave Mr Richard ______ ride to ______ Great Wall.
A. the; a B. a; the C. 不填; a D.不填; the
2. Green organizations are trying to save rain forests that have been _____ by farmers.
A. created B. ruined C. threatened D. protected
3. The roads have ______ because of people’s dependence on cars.
A. jammed B. been jamming C. to jam D. been jammed
