__________ many times, he finally understood it.
#92210
A
Being told
B
Telling
C
Having been told
D
Having told
推荐题目
We hope your suggestion will contribute __________ the problem. 
#88240
A
to solving
B
to solve
C
of solving
D
solved
We finished the run in less than half the time _________.
#97914
A
allowing
B
to allow  
C
allowed
D
allows