---Don't put the waste on the ground.-Oh I'm very sorry. I the dustbin（垃圾箱） there. A.

问题补充：

---Don put the waste on the ground.

---Oh, Im very sorry. I the dustbin（垃圾箱） there.

A. don see

B. isn seeing

C. didn see

D. haven seen

答案：

A. don see

B. isn seeing

(答案→)C. didn see

D. haven seen

解析：考查时态：句意：--别把垃圾扔在地上。--哦，对不起，我没看见这里的垃圾箱。说明刚刚没看见垃圾箱，用一般过去时。选C。