________ the working efficiency, the bos
题型:选择题
问题:
________ the working efficiency, the boss allows the employees to have a coffee break. [ ]
A. Improving
B. To improve
C. Having improved
D. Improved
________ the working efficiency, the boss allows the employees to have a coffee break. [ ]
A. Improving
B. To improve
C. Having improved
D. Improved