----Why didn’t you see me wave to you then ?--Oh If so. I must say sorry. I think I in

问题补充：

----Why didn’t you see me wave to you then ?

----Oh, If so. I must say sorry. I think I in the other direction.

A. looked

B. was looking

C. have looked

D. am looking

答案：

A. looked

(答案→)B. was looking

C. have looked

D. am looking

解析：考查时态。根据语境可知是陈述过去发生的事情。句意：—为什么那时你没有看见我向你挥手？—如果这样，我要向你道歉。我认为那时我正看别的方向。