Ответ:
1.came,had already cooked 2.returned,had already done 3.entered ,had already opened 4.gave,had bought 5.showed, had drawn 6.gave , had brought 7.saw, had not washed 8.understood ,had not done 9 knew, had not come yet 10.returned 11.had returned 12.finished 13. had finished 14.thought, had lost 15.told, had seen 16.woke, had already gone 17.thought , had not come yet