问题
单项选择题
Not until a large piece of stone fell from the Sphinx's right shoulder ______.
A．did the Sphinx begin to be damaged
B．did the experts take steps to protect it
C．did the polluted air begin to damage it
D．did the Sphinx begin to draw people's attention
答案
参考答案：B
解析：细节题。第二段说一块石头从右肩落下，所以人们为了保护他采取了各种措施。