Viết lại câu sao cho không đổi nghĩa

Giúp mik từ câu 16 vs ạ
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1. It's been a year since she started her new job.
2. She has ...
3. It's the first time they have visited the museum.
4. They haven't ...
5. She began studying ballet when she was five.
6. She has ...
7. The last time she met her parents was a ago.
8. She has not ...
9. How long ...
10. Have you ever climbed a mountain?
11. Is this ...
12. I started reading the book last night.
13. I have ...
14. This is the first time she has eaten a frog hotpot.
15. She has not ...
16. He started working as a teacher 30 years ago.
17. He has ...
18. Is this your first visit to Vietnam?
19. Haven't you ...
20. He last sent me postcards when he was in France.
21. The last time ...
22. She began writing the report 45 minutes ago.
23. She has ...
24. We knew each other when we were in grade 7.
25. We have ...
26. This is the first time I have joined such a fantastic birthday party.
27. I haven't ...
28. This is the second time I have seen Harry Potter.
29. I have ...
30. She moved to this city 6 months ago.
31. She has ...
32. Have you done this before?
33. Isn't this ...
34. She has taught the children in S.O.S village for 2 years.
35. She started ...
36. How long has it been since you bought this bicycle?
37. When ...
38. I last ate eel soup when I was in Vietnam.
39. I haven't ...
40. He has never tried sushi before.
41. This is ...
42. We began learning French two months ago.
43. We have ...
44. Is this the first time you have seen a shooting star?