In 1960, this was the longest bridge that .
A. was ever built
B. had ever built
C. has ever been built
D. had ever been built
网友回答
A. was ever built
B. had ever built
C. has ever been built
(答案→)D. had ever been built
解析：由“was”可知要用过去时，又由“the longest”可知有比较意味，要用完成时。