题目内容
-Don't put the waste on the ground.
-Oh, I'm very sorry. I ________ the dustbin there.
A. don't see B. isn't seeing C. didn't see D. haven't seen
C

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题目内容
-Don't put the waste on the ground.
-Oh, I'm very sorry. I ________ the dustbin there.
A. don't see B. isn't seeing C. didn't see D. haven't seen
C