the worker’s working efficiency, the manager will allow him to have a coffee break.A. Imp

发布时间：2020-08-16 18:57:51

     the worker’s working efficiency, the manager will allow him to have a coffee break.
A. Improving
B. To improve
C. Having improved
D. Improved

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A. Improving
(答案→)B. To improve
C. Having improved
D. Improved
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