题目内容

一Excuse me,sir.This is a non-smoking train.

一Oh,sorry.I____ know that.

A.haven’t known B.hadn’t know

C.didn’t know D.don’t know

C

【解析】

试题分析:考察时态。根据语境来看,吸烟的人不知道这是一节无烟车厢,这个不知道的行为发生在过去,所以用一般过去式。该对话意思为:--打扰了,先生,这是一节无烟车厢。----哦,对不起,我不知道。故选C

考点:考察时态。

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