38. All of us have to obey__________ strictly. A. traffic rules B. traffic jams C. traffic accidents D. traffic problems 39. __________ is Burning Festival held? – It's held every year. A. When B. How often C. How many D. How much 40. __________ does the teacher say La Tomatina sounds unusual? - Because people throw tomatoes at each other for one hour at the festival. A. Where B. How far C. What D. Why 41. After school, children queue up and wait for the bus ____ on the pavement in front of the school. A. safe B. bumpy C. safety D. safely 42. The café was crowded. _______, we found a table. A. However B. So C. Therefore D. Although 43. _________ it rained, we enjoyed our holiday. A. However B. Nevertheless C. Therefore D. Although