_____ 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
______ to reach them on the phone, we sent an email instead.
#92649
A
Fail
B
Failed
C
To fail
D
Having failed
In order to make our city green, _______. 
#98611
A
it is necessary to have planted more trees
B
many more trees need to plant
C
our city needs more trees
D
we must plant more trees
They won’t let their teacher _______ in that way. 
#98778
A
to be treated
B
being treated
C
treated
D
be treated