–Excuse me , Sir . Smoking is not allowed here .–Oh, sorry. I .A.haven’t knowB.d
来源：网络
时间：
推荐文章
–Excuse me , Sir . Smoking is not allowed here .
–Oh, sorry. I __________.
A.haven’t know
B.don’t know
C.hadn’t know
D.didn’t know
试题答案
D
交际用语及时态。由语境可以为过去式。