___      three times in a row, the boxer decided to make a fourth attempt, though.
#96700
A
Having defeated
B
To have defeated
C
Having been defeated
D
To defeat
推荐题目
________ many times,I still didn't know how to operate the machine.
#91844
A
Having taught
B
Having been taught
C
Being taught
D
Teaching
He did nothing but ________walk in the street. 
#95370
A
taking    
B
take    
C
to take    
D
took
I’m tired out.I stayed up the whole night, ______ for my midterm math exam.
#95982
A
studying
B
to study
C
to be studying
D
studied