___ the employees' working efficiency, the supervisor will allow them to have a coffee break.
#29030
A
Improving
B
To improve
C
Having improved
D
Improved
推荐题目
She looks more beautiful _____yellow than _______red.
#28642
A
in; at
B
in; in
C
in; is dressed in
D
are dressed in; in
---Please come here again. -----I will surely ____ you when I come to your city someday.
#28885
A
drop in at
B
drop in
C
drop on
D
drop in on
.If you compare food costs today ______ of a year ago, you will find the difference.
#69949
A
to that
B
to them
C
with that
D
with those
—What's wrong with your face?—I'm allergic ________ this kind of weather. Nothing serious.
#25271
A
for
B
with
C
to
D
by
20．We met _____ and have become good friends since then.
#28015
A
by mistake
B
by accident
C
by ourselves
D
by the way