People are becoming ________________ (increasing) worried about pollution.
举一反三
- Public opinion was becoming more ______ on environmental pollution problems; more and more people were discussing and arguing about them.
- Public opinion was becoming more ________ on environmental pollution problems; more and more people were discussing and arguing about them. A: concentration B: concentrated
- What are people worried about?
- Public opinion was becoming more ________ on environmental pollution problems; more and more people were discussing and arguing about them. A: concentrating B: concentration C: concentrated D: concentrate
- For years scientists have been worried about ________of air pollution on th eearth’s natural conditions.