_____ many times, but he still couldn't understand it.
#98333
A
Having been told
B
Though he had been told
C
He had been told
D
Having told
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
I got to the office earlier that day, ______ the 7:30 train from Paddington.
#90914
A
caught
B
to have caught
C
to catch
D
having caught