Across North China in the world namely the Great Wall.A. the longest wall runsB. runs the

问题补充：

Across North China in the world, namely the Great Wall.

A. the longest wall runs

B. runs the longest wall

C. does run the longest

D. does the longest wall run

答案：

A. the longest wall runs

(答案→)B. runs the longest wall

C. does run the longest

D. does the longest wall run

解析：考查倒装。当表示地点的介词短语位于句首时，用全部倒装，即把句子的谓语动词提到主语之前。句意：跨越中国整个北部的是世界上最长的城墙，即长城。Across North China表示地点，位于句首，应该使用全部倒装，A未倒装；D是部分倒装；C不完整。故选B。