----I’m sorry, but making a telephone call is not allowed in the meeting-room.
----Oh, I_____that, Sorry, I don’t do that again.
A．don’t knowB．didn’t knowC．won’t knowD．haven’t known
B
根據(jù)語境, “我不知道”, 應該指說話前的動作, 而現(xiàn)在已知道了。所以本題用一般過去時。
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