Possible Results:
estaba complementando
-I was complementing
Imperfect progressive yo conjugation of complementar.
Imperfect progressive él/ella/usted conjugation of complementar.

complementar

La labor relativa a la mitigación se estaba complementando con medidas de adaptación al cambio climático.
The work on mitigation was being complemented by action on adaptation to climate change.
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flea market