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Q:
A) Keeping up the training regimen had been done by him for a month. | B) For a month he has had been keeping his training regimen. |
C) He is training and this has been kept for a month. | D) His training regimen had been kept up by him for a month. |
Answer: D) His training regimen had been kept up by him for a month.
Explanation:
Explanation: