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.---I'm sorry, but there's no smoking room in this section on the train. ---Oh, I _____ that, and I ...
题目内容：
.---I'm sorry, but there's no smoking room in this section on the train.
---Oh, I _____ that, and I won't smoke again.
|
A．don't know |
B．won't know |
C．didn't know |
D．haven't known |
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