.---I’m sorry, but there’s no smoking room in this section on the train.  ---Oh, I _____ that, and I won’t smoke again.  
#103681
A
don’t know
B
won’t know
C
didn’t know   
D
haven’t known
推荐题目
He will stop showing off, if no notice_____of him.
#100266
A
is taken
B
will be taken
C
takes
D
has taken
  If you _____ it , I will lend the book to you.
#104137
A
read
B
will read
C
have read
D
were reading
John talked with me for about an hour yesterday.Never ________ him talk so much.
#99991
A
did I hear
B
had I heard
C
I had heard
D
I heard