The prospect has infuriated ordinary Mexicans, who have seen the purchasing power of their paychecks ______ more than 40 % since 1982.

【正确答案】 B

【答案解析】 动词词义辨析。burn“烧，烧焦”；break“削弱，减弱”；pollute“污染”；erode“侵蚀，腐蚀，逐渐受到侵犯”。根据句意，是指paychecks下降了40%还多，只有break符合句意。故答案为B。