____ 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
—What are you going to do this afternoon？ —I'm thinking of _____ to visit my aunt．
#98393
A
go
B
going
C
to go
D
to going
Badminton is a _____ by an Englishman.
#97369
A
game invented
B
play invented
C
match inventing
D
match invented
The person at the meeting is famous an actor.
#97129
A
referred ; for
B
referred to ; as
C
referred to ; for
D
referring ; as