627] -----
_______ in the workshop. Please stop it. ----- Sorry. I________.
[译文]
--车间里不许吸烟。请灭掉。 --对不起。我不知道。
A. Smoking is not allowed, don’t know B. Not smoking, an not sure
C. Don’t smoke, have no idea
D. Smoking is forbidden, didn’t know
[答案及简析]
D。
"不知道" 是在对方告诉之前,故需过去时。