假定你是李华，正是英国牛津参加短期语言培训，计划星期天去伦敦旅游。互联网上一则广告引起了你的注意，但一些具体信息不明确（箭头所指内容）。请给该旅行社发一封电子邮件，询问有关情况。
　　注意：1．词数100左右，信的格式已为你写好。
　　2．可根据内容要点适当增加细节，以使行文连贯。
　　3．参考词汇：牛津——Oxford 费用——fee
　　Dear Sir/Madame,
　　______________________________________________________________________________
　　Yours,
　　Li Hua
　　范 文
　　1
　　My name is Li Hua. I’m having a language training at Oxford University. I plan to have a trip around London on Sunday. luckily, I noticed that there is an advertisement on a tour around London on the net. However, I still have some questions.
　　First, I’d like to know what’s the price for students. And does it include the entrance fee and the lunch? If we visit the Buckingham, can we have shopping time? What’s more, will you please tell me the time to return because I have some other things to deal with later. I’ll be very thankful for your answer.
　　2
　　I am attending a short-term language training program right now in Oxford, planning for a visit to London on Sunday. When I was surfing the internet and happened to see your advertisement, it caught my notice at once. But there’re some details not clearly showed in the ad that I want to make sure.
　　Is the price charged in the ad the same for students? Does it include the cost for lunch, and is there any extra entrance fees needed? During the whole trip, will there be any time left for shopping? And when can we actually get back?
　　I need all the above information to decide whether to join your tour. Please send back your reply.
　　Thanks a lot.
　　3
　　I’m a student and I’m receiving English-training in Oxford University. I’ve planned to make a trip to London on Sunday. Several days ago, I happened to find an advertisement for a truly exciting day tour on the Internet. However, there are still some information unclear. So I’m writing to you to make them clear.
　　First, I don’t know whether shopping time during the tour is arranged. As you know, I’d like to do some shopping in London. Secondly, it is about the price. I wonder whether the price provided includes the entrance fees and the expense for lunch. What’s more, what about the price for students? Lastly, I want to know the time to return besides the start-time.
　　That’s all,. Your early reply will be appreciated.