Write a multi-choice question for the following article, with the given choices and answer: Article: Dear Tom, I go on a trip to Beijing with my father Rick. On the first day, we visit the Palace Museum. It is in the centre of Beijing. There are many rooms in it. You can see "No photos!" in some places. If so, you need to follow the instructions . On the second day, we visit the Summer Palace. It's great fun to boat there. I can swim, so I'm not afraid of water. Tomorrow we will go to the Great Wall. I also make a new friend Tony who comes from Australia. When he leaves, he gives me his e-mail address and telephone number. After the six-day trip, we can go back to New York by plane. I hope to see you soon. Bill Options: A For three days. B For four days. C For five days. D For six days. Answer: D For six days. Question:
How many days does Bill stay in Beijing?