________ 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
推荐题目
.--- Who would you like ______ to the ball with? ---Of course Mary. We’ll start at 6:30 and try to get there before 7:00.
#97027
A
to go
B
going
C
gone
D
to have gone
____the problem, it follows that we must develop a plan of action.
#90555
A
Recognizing
B
Having recognized
C
Recognized
D
Having recognizing
_______ advantages and disadvantages, Mr. Smith decided to leave the company and go to the west to try his fortune.
#96955
A
Having compared
B
Having balanced
C
Having observed
D
Having examined
He admitted ______ his best friend , Jack, _______to make up for that.
#95438
A
betraying , determining
B
betraying , determined
C
to betray , determining
D
to betray , determined
Would you please tell me the quickest way English well?
#94328
A
to learn
B
A or D
C
how to learn
D
of learning