第16题: [单项选择]The author advises consumers to______. A. look for foods with such words as "certified organically grown" B. grow their own food without synthetic chemicals C. buy foods from a seller they often deal with D. make sure the foods are pesticide free before buying them 参考答案:C 答案解析:文章最后一句是作者的两个忠告。后一个忠告(自己种)用破折号与前—个隔开，说明作者在此想取得一种特殊效果。其实，读者也不应把这一条建议当真对待，因为，绝大多数人没有时间、没有地方也不知道怎样种庄稼。相反
