Complete the conversation between the pe teacher and a student with the correct form of have to and the word in brackets

One night, I was at home alone and was going to fall asleep, when I noticed a musty smell. First i thought it was my imagination but it grew really nasty. I got out of bed trying to find where the smell was coming from. I was tired and went back to bed. About 2 o'clock, I woke up to a loud sound. I was sure heard it coming from downstairs. I quickly ran downstairs to see what it was and only then I noticed that it was very cold in the house. The musty smell in the house was really horrible now.  I suddenly felt i wasn't alone on the house anymore. My hair stood on end.  I saw a hooded monk. I was dead scared; .suddenly, the  figure started to fade away. When his head finally disappeared, the house wasn't cold anymore. I had to sit down on the floor for a while. Then I switched on all the lights in the house, and I called a friend and went to stay at his place. Never again did I sleep in that room!

14. Mark's mother watches as he writes an essay. 15. Mark writes an essay for two hours. 16. Mark wrote for five essays in this month. 17. Last year Mark also wrote essays. 18. Mark wrote an essay when he arrived. 19. Mark wrote an essay for a long time, when they came to his friends. 20. Mark has written an essay before his parents arrived. 21. By the end of the month, Mark wrote five works. 22. While the mother brand will plant the rose, he will write an essay. 23. By the time the parents of Mark will come home, he will write a composition for two hours.