5 A: Smoking is forbidden in the workshop, please stop it. B: Sorry, ______. A、 I am not sure B、 I have no idea C、 I do know D、 I did not know

5
A: Smoking is forbidden in the workshop, please stop it. B: Sorry, ______.
A、
I am not sure
B、
I have no idea
C、
I do know
D、
I did not know

出自：宿州学院大学英语

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