—Why were you so late this morning? —I in heavy traffic for an hour on the way here.A. ha

问题补充：

—Why were you so late this morning?

—I in heavy traffic for an hour on the way here.

A. have been caught

B. have caught

C. had caught

D. was caught

答案：

A. have been caught

B. have caught

C. had caught

(答案→)D. was caught

解析：考查时态和语态。句意：为什么你今天上午这么晚？—在来这里的路上我被交通堵塞堵了一个小时。根据句意说明使用被动语态。现在完成时表示过去所发生的事情持续到现在或者对现在的影响；一般过去时只是描述过去发生的事情。本题只是描述过去所发生的事情。故D正确。