【正确答案】 1、addicted→smoking environment→concern expert→wisdom possession→greed resources→inexhaustible    

【答案解析】After he recovered from the serious illness, the addicted smoker made up his mind to give up smoking. Nowadays more and more people show a great deal of concern for the environment, especially environmental problems, such as water and air pollution, green-house effect. We cannot always depend on the wisdom of the experts to solve the environ-mental problems; we should also take some actions to protect our environment. His greed for possessions made him try every possible means to gather what he wanted. Natural resources are not inexhaustible so we should save as much as we can.