_____ 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
       year after year , tigers are becoming fewer and fewer .
#96118
A
Having been killed
B
Killing
C
Killed
D
Having killed
Great attention must be paid ______ education, especially in the poor area.
#96944
A
develop
B
to develop
C
developing
D
to developing