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A:Look ,where are you going You are walking in the wrong dir

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A:Look ,where are you going You are walking in the wrong direction.
B:Oh ,I .
A.didn’t notice B.wasn’t noticing
C.haven’t noticed D.am not noticing
选什么,why?详解,
A:Look ,where are you going You are walking in the wrong dir
A. 哦,我刚没注意到.
Notice 不是一个延续性动词,所以不能加ing.
而且走错路这个动作正在进行,所以不能用完成时.