单选题 Upon arrival in the city they were shocked to learn that all surviving hospitals were still being ______ by crowds of casualties needing treatment.(2006年厦门大学考博试题)
【正确答案】 C
【答案解析】解析：本题空格处是说“所有幸存下来的医院依旧被成群需要治疗的伤员团团围住”。四个选项中，A项enclosed的意思是“放入封套，装入，围绕”，B项embarrassed的意思是“使困窘，使局促不安；阻碍，麻烦”，C项besieged的意思是“围困，围攻，包围”，D项penetrated的意思是“穿透，渗透，看穿，洞察”。根据题意，C项为正确答案。