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the working efficiency, the boss allows the employees to have a coffee break. [

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the working efficiency, the boss allows the employees to have a coffee break. [

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

试题答案

B

标签：employeesallowshavetoworking

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