21. He (live) ....had lived.... in the country for ten years when he first (come) .....came... to London.

22. I (not talk) ......didn't talk..... to him because when I (arrive) .....arrived... he already (leave) ...had left.......

23. When we (go) ......had gone........ out again, the wind (stop) .......stopped.........

24. He (think) ......had thought........ he (win) .....won.... in the lottery but he (not have) ......didn't have.... of course.

25. No sooner the bell (ring) .....had rung....... when the pupils (go) ..........went...... out to play.