________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
 all the required papers, he didn’t answer the questions fluently in class.
#93752
A
Having not read
B
Not having read
C
Not read
D
Not to read
The girl _______ a green coat looks more elegant than her companion.
#88571
A
worn
B
to wear
C
having worn
D
wearing
All of us consider it wrong ___ in the exam.
#98690
A
to be cheated
B
have cheated
C
to cheat
D
having been cheated
I don’t want to listen a long story — just _____ me the result. 
#97450
A
tell
B
telling
C
to tell
D
to be telling