over / in / during the past /last + 时间段,表示 在过去的多少时间,
这是现在完成时 典型的时间状语.
所以这里填 has been reflecting 这里用现在完成进行时比较好,表示经理一直在反思如何改善...
the manager()(reflect)on how to improve the quality of produ
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