________ 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
The old man ____ down by a truck is being saved now. 
#90780
A
knocking
B
to knock
C
knocked
D
being knocked
The man _______ over there was injured in a car accident yesterday.
#95380
A
operate on
B
being operated on
C
to operate on
D
being operated
The English in this story has been simplified to make it easier _______.
#96054
A
to be understood
B
understood
C
understanding
D
to understand