Ответ: 1.started 2. worked 3. didnot walk 4.did you play 5.cooked 6.didnot watch 7.washed 8.cried 9.finished 10.surfed 11.didnot enjoy 12.listened 13. did you visit 14. helped 15.didnot traveled 16.tried 17. did you 18.did your friend ski 19.used 20.opened