单选题 There is a clear link between humans and environmental problems.________, wherever humans live, they damage the environment in some way.
【正确答案】 A
【答案解析】本题考查常用语的辨析。A项为“换句话说”；B项为“退一步讲”；C项为“随你怎么说”；D项为“话虽如此”，根据句意，故选A。