The Great Wall is tourists attraction that millions of people pour in every year.A. so a

问题补充：

The Great Wall is tourists attraction that millions of people pour in every year.

A. so a well known

B. such a well known

C. a so well known

D. such well known a

答案：

A. so a well known

(答案→)B. such a well known

C. a so well known

D. such well known a

解析：考查固定句型。such+a/an+形容词+名词；so+形容词+a/an+名词；排除A、C、D。句意“长城是一个众所周知的旅游景点，以至于每年有几百万人涌入长城。”故选B。