长城既是历史文化古迹，也是独一无二的自然景观。

长城既是历史文化古迹，也是独一无二的自然景观。
A.The Great Wall is cultural relic and the only landscape without the second one.
B.The Great Wall is cultural relic and unique natural landscape.
正确答案：The Great Wall is cultural relic and unique natural landscape.