Safe is the best option but it could also be wary or even rash as well but it's more likely to be safe and if that's not the correct word choice then it's a safe bet wary is the correct possible alternative hope this helps you out!
Answer:
It's either A or D but I think A is more likely
3. I did it wrongly
4. They don't read books
5. You didn't ask me any question
6. She did nothing
7. He doesn't do his homework
8. He didn't buy some guavas
9. I don't sleep well
10. He doesn't reach English
11. He didn't buy anything yesterday
12. He so much disrespected me yesterday
13. My friend doesn't work in London
14. He opened the door
15. We didn't buy any grape
16. They haven't started their work
17. I am not fine
18. Either Sisa or Rita is bad
19. Hari seldom visit Pokhara
20. Nobody is sitting there
he enjoys nature and wants someone to share it with
