________the working efficiency，the boss allows the employees to have a coffee break.
#88719
A
Improving
B
To improve
C
Having improved
D
Improved
推荐题目
Most of the guests ______to his wedding are his close friends.
#92114
A
being invited
B
invited
C
inviting
D
had been invited
The problem referred to at the class meeting, if ______________ in time, will make a bad effect on everyone in our class.
#88417
A
not dealt with
B
not to deal with
C
not being dealt with
D
not dealing with
It was reported that a little boy under a destroyed house for three days was pulled out alive at last.
#91715
A
trapped
B
being trapped
C
was trapped
D
had been trapped
The medical team left the village with great satisfaction, ____ a lot of local villagers.
#96624
A
treating
B
having treated
C
to treat
D
treated
Judging from his manners at the party, he doesn’t seem ______ much education.
#97937
A
to receive
B
to be receiving
C
to have received
D
to have been received