---Miss Wang I went to your office at 11:45 yesterday morning but you weren’t inI

问题补充：

---Miss Wang, I went to your office at 11:45 yesterday morning ,but you weren’t in. --- I with a student in the classroom at that time.

A. am talking

B. talk

C. talking

D. was talking

答案：

A. am talking

B. talk

C. talking

(答案→)D. was talking

解析：句意：王老师，我昨天上午11:45去了你的办公室，但是你不在。——那时我正在教室里和一个学生谈话。结合语境可知下文描述的是过去正在进行的动作，故用过去进行时态。选D。