第32题: [单项选择]Humans should not develop their economy at the ______ of the ecological environment. A. destruction B. pollution C. expense D. mercy 参考答案:C 答案解析:[解析] 本题空格处是说在损害生态环境的情况下。at the expense of的意思是“在损害……情况下,以……为代价”;at the mercy of的意思是“受……的支配”。根据题意, C项为