________ 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
When ________ to danger and conflict, men tend to increase blood pressure, ________ nervous and anxious.
#93524
A
exposed; felt
B
exposed; feeling
C
exposing; feeling
D
exposing; felt
Don't pretend ________ when you don't.
#88672
A
knowing
B
know
C
to know
D
to knowing