Difficult _____ in practice, this new technique hasn’t been applied.
#91010
A
operated
B
to be operated
C
operating
D
to operate
推荐题目
I’ll have all of the readings ____ by the end of this term if my plan goes well.
#96010
A
completing
B
to complete
C
completed
D
being completed
Hearing a scream, I rushed downstairs, only the hostess lying unconscious on the floor.
#93890
A
seeing
B
having seen
C
seen
D
to see
Nearly all the people believe confidence is the key to success.
#94534
A
interviewing
B
having interviewed
C
to interview
D
interviewed
This machine is very easy . Anybody can learn to use it in a few minutes.
#94917
A
operating
B
to be operating
C
operated
D
to operate
Chinese news reported today that a woman in Hongbai had been rescued after ____ in a tunnel for nine days.
#97206
A
trapping
B
being trapped
C
having trapped
D
to be trapped