IV. There is one mistake in each of the following sentences. Find and correct it.
19. What (A) do you compare (B) the time you spend watching (C) TV to the time you on
other activities (D)?
20. Henry wants to go (A) overseas and (B) he does not (C) have enough money (D).
21. Nam didn't (A) win the race because of (B) he ran (C) too slowly (D).
22. Where (A) performance in (B) the concert was (C) the most (D) interesting?
23. Although (A) the football game was (B) over, but (C) the fans stayed (D) in their seats
cheering.