Have you ever been to the square was built last year?A. which B. where C. when D what

问题补充：

Have you ever been to the square was built last year?

A. which B. where C. when D what

答案：

解析：本句先行词the square为下文句子主语，built的动作对象，指物，故引导词只能用which，选A。