单选题 —Don't put the waste on the ground, young man. —Oh, I'm sorry. I ______ the dustbin there.
【正确答案】 B
【答案解析】 [解析] 如果描述刚才一瞬间进行的动作用过去进行时,如I wasn't listening,过去某一结果用一般过去时,如I didn't hear it。