—Did you notice him come in?—No I a football game.A. have watchedB. had watchedC. am watc

问题补充：

—Did you notice him come in?

—No, I a football game.

A. have watched

B. had watched

C. am watching

D. was watching

答案：

A. have watched

B. had watched

C. am watching

(答案→)D. was watching

解析：句意：你注意到他进来了吗？——没有，我（当时）正在看一场足球比赛。结合语境可知下文描述的是过去某时正在进行的动作，故用过去进行时态，选D。