— Please stop smoking. Look at the sign. — Oh ,sorry. I     see it.
A．don’tB．won’tC．wasn’tD．didn’t
D

試題分析：句意：--請停止吸煙，看這個(gè)標(biāo)志。--哦，對不起，我沒有看見。根據(jù)Look at the sign可知現(xiàn)在已經(jīng)知道了禁止吸煙的事情，剛才不知道，所以應(yīng)該用一般過去式。故選D。
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