Inside the White House there is a room called the Oval Office. That's President Obama w

问题补充：

Inside the White House, there is a room called the Oval Office. Thats President Obama works.

A. why

B. where

C. what

D. how

答案：

A. why

(答案→)B. where

C. what

D. how

解析：答案：B。句意：在白宫里有一个被称为“the Oval Office”的房间。那是奥巴马总统工作的地方。考查表语从句的引导词。从句中缺少地点状语，故用where引导。