1. He found his new acquaintance to be ________: trying to understand her personality was like peering into an unknown dimension. A. cosmopolitan B. imperturbable C. inscrutable D. puerile
2. In the gloriously hot summer of nineteen fourteen, the murder of Austria-Hungarian Archduke in an obscure part of the Balkans provided the spark which set Europe ablaze.(划线词：obscure） A. indistinct B. unfriendly C. imprecise D. unknown
【考博英语补全句子】 1. ________________（这两个国家断绝了外交关系）on the eve of World War Two. 2. I’m afraid he is ______ ________ ______（不能胜任）the position.
