22、____ the working efficiency(工作效率), the boss allows the employees to have a coffee break.
A.Improving B.To improve
C.Having improved D.Improved
科目:高中英语 来源: 题型:
____ the working efficiency(工作效率), the boss allows the employees to have a coffee break.
A.Improving B.To improve
C.Having improved D.Improved
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