II. Complete the sentences with since, for, already, yet, ago or never. 1. Maria has studied English _____________ less than a year. 2. I haven’t heard from my sister ___________ the beginning of March. 3. It’s only 9 o’clock and my mother has ______________ gone to bed. 4. Silvia has bought a new dress, but she hasn’t worn it _________. 5. Life in the countryside was very different a hundred years __________. 6. Michael has been ill _________ a long time. He has been in hospital ___________ October. 7. Have they had an answer ____________? 8. We’ve known each other __________ we were at school. 9. I’ve _____________ heard of a “Sudoku”. What is it? 10. I’m afraid we’ve __________ made plans for this weekend, so we won’t be free.