we -- people -- riding in cars to decrease the amount of CO2.we need to take a campaign.
问题描述：
we -- people -- riding in cars to decrease the amount of CO2.we need to take a campaign.
A could ask ,stop B should urge,to stop
C must urge,stopping D can ask,stopped
答
同学,很高兴回答你的问题正确答案：选B即：We should urge people to stop riding in cars to decrease the amount of CO2.We need to take a campaign.翻译：我们应该强烈要求人们停止开车以降低二氧化碳的排放量....