11、―I'm sorry，but smoking is not allowed in this section on the train．
―Oh，I
__________ that，and l won't again．
A．don't know B．didn't know C．won't
D．haven't
known
科目：高中英语 来源： 题型：
―I'm sorry，but smoking is not allowed in this section on the train．
―Oh，I __________ that，and l won't again．
A．don't know B．didn't know C．won't D．haven't known
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