---What do you think of the film?-Cool! Never before a better one.A. had I seenB. I ha

问题补充：

---What do you think of the film?

---Cool! Never before a better one.

A. had I seen

B. I have seen

C. have I seen

D. I had seen

答案：

A. had I seen

B. I have seen

C. have I seen

D. I had seen

解析：句意：--你认为这个电影怎么样？--很酷！以前我从没有看过更好的了。这里使用Never before放在句首，因为是否定词，所以后面用倒装句，将助动词提到主语前面，和never before连用用现在完成时，所以选C。