We have worked as volunteers at this SOS village for 3 months.
A. It’s 3 months since we stopped working as volunteers at this SOS village.
B. We last worked as volunteers as at this SOS village 3 months ago.
C. It’s 3 months since we didn’t work as volunteers as at this SOS village.
D. It’s 3 months since we worked as volunteers at this SOS village.
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