—Cathy did you attend the lecture given by Mr Black last night?—No. I a report at the of

问题补充：

—Cathy, did you attend the lecture given by Mr Black last night?

—No. I a report at the office.

A. was writing

B. wrote

C. had written

D. have been writing

答案：

(答案→)A. was writing

B. wrote

C. had written

D. have been writing

解析：考查时态：句意：--Cathy，你参加昨晚布莱克先生做的讲座的了吗？--没有，我在办公室写报告。根据句意，Cathy在办公室写报告的时间就是昨晚布莱克先生做讲座的时候，所以用过去进行时，选A。