Directions: Fill in the blanks with one of the following preposition s (介词): in, on, at, to, of, from. To: henrys@bbt.com From: lihong@information.com.cn Subject: An invitation (1) ______ the conference (2) ______ electronic technology Dear Mr. Smith, We are happy (3) ______ inform you that our company is going to hold a conference (4) ______ electronic technology (5) ______ Beijing next month. We would be honored if you could attend. The purpose (6) ______ the conference is to show our latest products. Our general manager will give a presentation. And there will also be a tour of out factory. The conference will be held (7) ______ 12 May to 14. If you are able (8) ______ come, please let us know your arrival time and flight number. We will meet you (9) ______ the airport. We will also reserve a room for you at JInlong Hotel, where the conference will be held. Looking forward (10) ______ meeting you in Beijing. Yours, Li Hong