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​This is no-smoking zone.Can't you see the sigh?Sorry,

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​This is no-smoking zone.Can't you see the sigh?Sorry,I_______it.
This is no-smoking zone.Can't you see the sigh?Sorry,I_______it.
A.haven't seen B.won't see C.don't see D.didn't see
请问选A和选D有什么区别,我感觉两个都可以,
请看那边有个“禁止吸烟”的标志.
噢,对不起,我刚才没看到.（表示过去时,刚才）
选D.
A是完成时,D是过去时.
在这里没必要用完成时,就是表示刚才没有看到标志.
再问： 这不是上面的动作造成他没看到而吸烟，不应该是过去完成时的标志么。
再答： 没必要用完成时，用完成时表示现在还没有看到。
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