________the working efficiency, the boss allows the employees to have a coffee break.
#96343
A
Improving
B
To improve
C
Having improved
D
Improved
推荐题目
— Look how happy you are!—Yeah, I feel honored ______ into their society.
#90002
A
to welcome
B
welcoming
C
to be welcomed
D
welcomed
Earth is believed ______ by an object the size of Mars at some point in the distant past before itssurface cooled.
#88257
A
to be hit
B
to have hit
C
to have been hit
D
to hit
I appreciate ______ the opportunity to work in your company two years ago.
#96135
A
giving
B
to give
C
being given
D
to be given
The living room is clean and tidy, with a dining table already ______ for a meal to be cooked.
#90697
A
having laid
B
laying
C
laid
D
being laid
________ 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