Another word for no regrets is impenitent.
Impenitent means to not have any regrets or feel any shame about one's attitude or actions.
Examples of impenitent in a sentence :
-The bully was impenitent when he pushed the little boy off the swings.
-Julie's impenitent attitude after reading Sara's diary in front of her whole class, led to detention from the Headmistress.
Answer:
Tom <em>has </em>finished the test.
We <em>have </em>met our new neighbors.
<em>Has </em>Kevin ever missed an English class?
I <em>have</em> never taken an online course.
<em>Have </em>you done your homework?
Explanation:
Past and present tense
Answer: 11. sounds
12. deliver
13. paragraph
14. buttons
15. teacher
16. synonym
17. antonym
18. antonym
19. synonym
Explanation: hope it helps !