问题
选择题
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
答案:B
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。