单选题 During an international crisis, many ______ messages will generally emanate from the president's once.
  • A. confidential
  • B. abstruse
  • C. appalling
  • D. compelling
【正确答案】 A
【答案解析】[解析] confidential机密的；abstruse深奥的；appalling骇人听闻的；compelling引人入胜的。所以，本题选A。