10. Choose the correct tense to fill in the blanks.1) This happened about ten years ago. I ___ with a college friend, Ann, in the country.a) was staying b) stayed c) had stayed d) have been staying 2) They __ a very large old country house a few miles from Cambridge.a) recently bought b) have recently bought c) had recently bought d) had been buying3)It was a dark, winter afternoon and we ___ in the sitting room.a) have been chatting b) were chatting c) chatted d) had chatted 4) Sarah's mum ___ a little while earlier, so we were alone in the house. a) went shopping b) had been shopping c) had gone shopping d) had been going shopping5) Then, to our surprise we ___ someone walking around in the room above. a) have heard b) had heard c) heard d) kad been hearing 6) But Ann said, "Oh I expeet mum ___ something - she always does." a) has forgotten b) had forgotten c) forgot d) was forgetting 7) So we took no notice and___ talking.a) had carried on b) were carrying on c) have been carrying on d)carried on8) Imagine our surprise when five minutes later, we___ Ann's mum's car driving up to the house!a) had seen b) saw c) had been seeing d) seen