Not until he took off his dark glasses he was a famous film star. A. had I foundB. did I

问题补充：

Not until he took off his dark glasses he was a famous film star.

A. had I found

B. did I find

C. I found

D. found I

答案：

A. had I found

(答案→)B. did I find

C. I found

D. found I

解析：考查时态及主谓倒装，句意：直到他摘下他的墨镜时，我才发现他是一个著名的影星。Not until谓语句首时，主语采用部分倒装，助动词提前。结合语境可知主语描述的是过去某时的动作，助动词用一般过去时态。选B。