When doing business in the Arab world, do not be surprised if your meeting is interrupted several times by people who come into the room _____, whisper, or speak softly to the person with whom you are talking, and leave.
句意： 在阿拉伯国家做生意的时候， 如果你的会议多次被那些不打招呼就进入， 与和你谈话的人低声耳语然后兀自离开的人打断， 你也不要太惊讶。unannounced意为"未事先通知的； 为提前说明的"， 在这里为形容词作定语， 修饰people。 本题答案为A。