—Where ?—I got caught in the traffic or I would have been here sooner.A. did you goB. had

问题补充：

—Where ?

—I got caught in the traffic, or I would have been here sooner.

A. did you go

B. had you gone

C. have you been

D. were you going

答案：

A. did you go

B. had you gone

(答案→)C. have you been

D. were you going

解析：从答语“or I would have been here sooner” 可知问句的动作与现在有关，have been表示 “曾经去过，现在已经回来”，符合本题语境。