10．–Don’t put the waste on the ground young man. --Oh I’m sorry. I the dustbin there.A.

问题补充：

10．–Don’t put the waste on the ground, young man.

--Oh, I’m sorry. I the dustbin there.

A. didn’t see

B. hadn’t seen

C. can’t see

D. wasn’t seeing

答案：

(答案→)A. didn’t see

B. hadn’t seen

C. can’t see

D. wasn’t seeing

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