单选题 Absorbed in her work, she was totally ______ her surroundings.
  • A. liable for
  • B. separated by
  • C. oblivious of
  • D. concerned about
【正确答案】 C
【答案解析】[解析] liable for对……负责；separated by被隔绝，被孤立；oblivious of遗忘的，忘却的；concerned about关心，挂念。所以，本题选C。