Could you please check which of the sentences is grammatically correct?
1. Having participated in this program since 1991, our organization successfully completed the evaluation exercises OF a number of its unit.
2.Having participated in this program since 1991, our organization successfully completed the evaluation exercises IN a number of its unit.
Say eg 2. Having participated in this program since 1991, our organization successfully completed the evaluation exercises IN a number of its units. I'd also consider saying .
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.Say eg
2.Having participated in this program since 1991, our organization successfully completed the evaluation exercises IN a number of its units.
I'd also consider saying . . . our o