Answer:
16. Who won the basketball match?
17. Whom shall we ask when we get there?
18. Whose did they take?
19. Which one do you prefer?
20. What is your exact location?
Explanation:
Interrogative pronouns are used when we need to ask questions. Interrogative pronouns are when we do not know of what we are asking the question about.
These are four interrogative pronouns are the most common ones: who, whom, what, which.
The possessive pronoun whose can also be used as an interrogative pronoun. When this happens it is called an interrogative possessive pronoun.
(hope it helps)
