III Choose the right variant.I ______ by 10 o’clock yesterday.had returned b) returned c)have returnedShe _______ never ______ the song before the concert.have...heard b) was....hearing c)had...heardWhat ____ she________ before the film began?had...translated b) was....translating c) did... translatedHe had written three invitation letters when I ______had come b) came c) was comingIt _______ snowing by 8 o’clock.had finished b) finished c) was finishingBy 5 o’clock the rain had stopped and they _______ to the park.had gone b) have gone c) wentI _______ the newspaper by 6 o’clock. read b) had read c) was readingThe students ___________ the room by that time.have cleaned b) had cleaned c) cleanedHer mother had cut the pie before I ______have phoned b) phoned c) was phoning.