试题题干
The （ ） is the building in Washington D.C., which is the headquarters of the U.S. Department of Defense.
参考答案
正确答案：
试题解析
本题主要考察美国的五角大楼。
the Pentagon: the building in Washington, which is the headquarters of the U.S. Department of Defense. 五角大楼： 该大楼位于华盛顿，是美国国防部的总部。
A选项白宫，B选项唐宁街10号，D选项白厅均不符合题干要求，故选C。