—Beg your pardon but I didn’t quite catch what you said.—Oh I to myself.A. have talkedB.

问题补充：

—Beg your pardon, but I didn’t quite catch what you said.

—Oh, I to myself.

A. have talked

B. am talking

C. had talked

D. was talking

答案：

A. have talked

B. am talking

C. had talked

(答案→)D. was talking

解析：本题考查动词时态。Oh, I was talking to myself.意为“噢， 我（刚才）只是在自言自语”。 所以这个应该选D。