— What did the teacher say just now? — Sorry I didn’t hear it. I out of the window.A. loo

问题补充：

— What did the teacher say just now?

— Sorry, I didn’t hear it. I out of the window.

A. look

B. looked

C. am looking

D. was looking

答案：

A. look

B. looked

C. am looking

(答案→)D. was looking

解析：根据上文可知是表示过去正在做某事。