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 |
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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 |
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