Not until yesterday    that I had made a serious mistake.
#79928
A
didn’t I realize
B
did I realize
C
I didn’t realize
D
I realize
推荐题目
He left home in 1980 and has never come back ____. 
#84129
A
though
B
while
C
when
D
since
Tom doesn’t want to take part in any school activities,________.
#84199
A
and David doesn’t too
B
and David doesn’t either
C
and so doesn’t David
D
and either does David