- Smoking is forbidden in the workshop, please stop it.- Sorry, I ________________.
A.am not sure
B.have no idea
C.do know
D.did not know
正确答案是D
- Smoking is forbidden in the workshop, please stop it.- Sorry, I ________________.
A.am not sure
B.have no idea
C.do know
D.did not know
正确答案是D