IV. Write the correct forms of the words in brackets. 16. Vincent van Gogh is a famous __________ of all time. (ART) 17. I can’t solve this problem. I will contact my __________ tomorrow. (LAW) 18. We're going _______ in Moc Chau. (HIKE) 19. Look! It is ________. It is going to rain. (CLOUD) 20. If you want to travel to Việt Nam, you should know about some ________ rules in this country. (CULTURE)