3. invitation
translation
collection
celebration
suggestion
2. what
3. what
4. how often
5. why
6. how much
7. how
8.when
9. whom
10. what
11. whose
12. how much
13. how many
14. what
15. where
16.when
17.why
18.who
19. how often
20. how many
21. where
22. why
23.what
24.whom
25.when
26. how
27. why
28. how old
29.what
30. what
1-doesn`t say . 2-doesn`t say. 3-Right. 4-doesn`t say. 5-Right.6- Right.7-Doesn`t say. усё
1. He persisted in trying to solve that difficult problem.Он продолжал попытку решить такую сложную задачу( герундий trying) 2. The results of the experiments must be checked and rechecked before being published.Результаты эксперимента должны быть проверены и перепроверены перед публикацией( being published)3. He was accused of not following the safety rules.Он был обвинен в несоблюдении правил безопасности(<span>following)</span>
2. w<span>rote
3. have, seen
4. didn't lea</span><span>rn
5. snowed
6. haven't </span><span>rented</span>