单选题 But in our enthusiasm to discover our heritage, we are ruining the very scenery we go to enjoy, damaging natural habitats, ______ down footpaths, disturbing wildlife, polluting the air and dropping litter.
A. wearing B. treading C. falling D. cutting

【正确答案】 A

【答案解析】[解析] 原句中的mining the very scenery we go to enjoy, damaging natural habitats,______ down footpaths, disturbing wildlife, polluting the air和dropping litter均为并列关系，从意思上看，空白处的词应和ruin，damage，disturb，pollute呈同义关系，即应当是表示“破坏”类的词，故用wear。wear down是固定词组，意思为“磨损”，如：The heels of my shoes are wearing down．(我的鞋跟磨损了。)其他三个动词此处与down搭配，都在逻辑语义上不通。