________ his lessons , he failed in the exam. 
#90060
A
Not reviewing
B
Having not reviewed
C
Not reviewed
D
Not having reviewed
推荐题目
If you go on thin ice ,you risk ______through.
#96086
A
fall
B
to fall
C
fell
D
falling
A person , when_________,can often do what is normally beyond his ability.
#90324
A
challenged
B
challenges
C
challenging
D
to challenge
I planned ________ to see you last week, but I was ill.
#98412
A
to have come
B
to come
C
to be coming
D
to have been coming