A: Whose is this necklace?B: I don't know. I ___ it while I ___ the carpet.A. found-was cleaning B. have found-was cleaning C. had found-cleaned D. found-had cleaned - Tenses | English Grammar Quiz

A: Whose is this necklace?

B: I don’t know. I ___ it while I ___ the carpet.

A. found-was cleaning

B. have found-was cleaning

C. had found-cleaned

D. found-had cleaned

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