—What do you think of the new bridge? —I have never seen before.A. so a long oneB. so lo

问题补充：

—What do you think of the new bridge?

—I have never seen before.

A. so a long one

B. so long one

C. such a long one

D. a such long one

答案：

A. so a long one

B. so long one

(答案→)C. such a long one

D. a such long one

解析：句意:-你认为这座新桥怎么样？-我以前从没见过这么长的桥。so 后跟形容词或副词；such a/an 形容词+名词。他们的意思都是如此…。故选C。