语法与词汇11.But, in our enthusiasm to discover our heritage, we are mining the very scenery we go to enjoy, damaging natural habitats, ______ down footpaths, disturbing wildlife, polluting the air and dropping litter.
【正确答案】
B
【答案解析】本题空格处是说踩出小路。B项“tread踏，行走，踩碎，践踏”符合题意，如：I trod on his foot by accident．(我偶然踩了他的脚。)其他三个词此处与down搭配，都在逻辑语意上不通。