单选题—I’m sorry, but there’s no smoking on this flight. —Oh, I ______ that. Sorry, I won’t again.Adon’t knowBdidn’t knowCwon’t knowDhaven’t known
单选题
—I’m sorry, but there’s no smoking on this flight. —Oh, I ______ that. Sorry, I won’t again.
A
don’t know
B
didn’t know
C
won’t know
D
haven’t known
参考解析
解析：
句意：——对不起，飞机上不准吸烟。——哦，我不知道。对不起，我不会再吸了。本句表示刚刚不知道，要用一般过去时。故答案是B项。
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