____ several times, the young scientist still kept on doing his experiments.
#92897
A
Having failed
B
Having been failed
C
Failed
D
To fail
推荐题目
I’m sorry, but I didn’t see how we can get all this work you assigned_______ by next Tuesday.
#95499
A
having done
B
done
C
being done
D
to do
That was a terrible night . The rain was pouring down, _________ thunder and lightning.
#91546
A
being accompanied by
B
accompanied by
C
accompanying
D
accompanies
