Some people don’t feel secure when living in big cities with high crime rates. A. safe B. unsafe C. happy D. unhappyĐoạn văn23/50Circle the letter A, B, C, or D to indicate the word/ phrase CLOSEST in meaning to the underlined word in the questions. Some people don’t feel secure when living in big cities with high crime rates.safe unsafe happy unhappyGiải thíchChọn A