IV. Give the correct form of each word in the brackets. 16. I study in a private school and there are a lot of ________ students here. (nation) 17. The _________ is very close. It’s only five minutes’ walk from here. (book) 18. The indoor gym and the ________ pool are favourite facilities in Trang’s school. (swim) 19. It’s mum’s birthday tomorrow. Let’s get her some flowers from the ______. (bake) 20. I’m interested in history. My teacher often lets us watch videos about _______ past events. (difference)