----- in the workshop. Please stop it.
----- Sorry. I .
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
网友回答
A. Smoking is not allowed, don’t know
B. Not smoking, an not sure
C. Don’t smoke, have no idea
(答案→)D. Smoking is forbidden, didn’t know
解析： 不知道 是在对方告诉之前，故需过去时。